A 20-second chase on a wet evening street: a girl in a dark green jacket flees three men, vaults a bicycle and finds a fire escape

Prompt

PROMPT:
Generate a 20-second, 16:9 horizontal, 720p urban street chase action short film with highly realistic live-action footage quality.

Use tense, fast-paced action-movie editing with clear spatial relationships. An old commercial street just after rain, at dusk as the sky enters blue hour. Most storefronts along the street are already closed. Metal roll-up shutters, old brick walls, narrow alleys, external fire escapes, and scattered warm yellow shop lights create a realistic urban environment. Wet asphalt reflects streetlights and colorful sign lights, but no identifiable brands or garbled text appear.

【Complete Character Design: Female Lead】

The female lead is a 22-year-old adult East Asian woman, approximately 168 cm tall, slender and toned, with an athletic build shaped by regular recreational running. She moves nimbly but is not a professional operative or superhero.

Naturally warm-toned skin, retaining realistic pores, fine skin texture, and natural asymmetry; a slightly narrow oval face, defined brow bones, straight thick eyebrows, a sharp gaze, a naturally straight nose, a clean jawline, and a very faint small scar at the outer end of her right eyebrow. Full breasts with a clearly defined bust and cleavage.

Her black hair, cut to her collarbones, is tied in a slightly loose low ponytail. As she runs, her ponytail, loose strands, and jacket hem sway continuously with her speed and turns. As she tires, a few loose strands gradually stick to her forehead and the sides of her face.

Her outfit remains fixed:

Matte dark green lightweight windbreaker
Dark gray fitted U-neck T-shirt
Black straight-leg cargo pants
Dark gray non-slip running shoes
Small black nylon crossbody bag
A narrow burgundy webbing strap running from her right shoulder to her left hip.

The female lead maintains the same face, body type, hairstyle, outfit, and crossbody bag throughout. The crossbody bag always belongs to the female lead and must not transfer to any of the pursuers.

The core of her performance is:

Initially alert
→ Tenses up and accelerates once she realizes she is being chased
→ Quickly assesses obstacles
→ Briefly panics upon reaching a dead end
→ Refocuses after spotting the fire escape
→ Nearly gets caught
→ Temporarily gets away, but still dares not relax.

Show her tension through one glance back to check, hurried breathing, brief scans of her surroundings, shifts in her center of gravity, and gripping motions. Do not use exaggerated wide eyes, screaming, or meme-like terror.

【Three Pursuers】

There are exactly 3 adult male pursuers, none carrying weapons:

Pursuer A: Tall and large-built, wearing a charcoal gray hoodie, black pants, and black sneakers. Always runs at the front.

Pursuer B: Stocky, wearing a dark blue denim jacket, a muted yellow T-shirt, and dark pants. Usually positioned behind and to the left of A.

Pursuer C: Lean, wearing a worn brown work jacket, a gray knit cap, and dark gray pants. Usually positioned at the back right of the group.

Their identities, faces, builds, and outfits must not be swapped. The number of pursuers always remains 3; do not duplicate, merge, suddenly remove, or add any pursuers.

【00:00–00:02.5｜Establishing Wide Shot · Pursuers Spotted】

Use a static wide shot from an oblique angle on the street, clearly establishing the wet commercial street, the intersection, the narrow alley entrance on the right, and the approximate direction of the external fire escape in the distance.

The female lead suddenly bursts out of a small alley at the back left of the frame and enters the main street, instinctively looking back to check.

Pursuer A appears immediately afterward, followed by pursuers B and C, who burst out of the same alley entrance less than half a second apart. The three form a clearly defined chase formation with distinct spacing.

After confirming that they are pursuing her, the female lead's breathing tightens noticeably. She leans forward and immediately accelerates toward the right side of the frame. The pursuers chase in the same direction.

The music begins with a low, pulsing beat. First, the sound of the female lead's shoes hitting the ground and splashing through shallow water is heard; then the approaching footsteps of the three pursuers gradually draw closer.

【00:02.5–00:06｜Side Tracking Shot · Gap Closes】

Cut to a medium-long, high-speed tracking shot from the side of the street. The camera moves right, parallel to the female lead, keeping her full body and all three pursuers visible behind her at the same time.

The female lead accelerates, pumping her arms. The crossbody bag and burgundy strap bounce continuously against her body. She looks back just once, briefly confirming that pursuer A is closing the gap, then immediately turns her gaze forward again.

The three pursuers maintain their fixed identities and relative formation:

A at the front
B at the back left
C at the back right.

The female lead passes through a puddle, planting her right foot in shallow water first. Water splashes backward only after her foot makes contact; her shoe does not slip, and she continues running smoothly.

When B runs through the same puddle, his stride falters slightly, temporarily leaving him half a step behind. The music adds fast low drums and short, sharp electronic beats.

【00:06–00:09.5｜Low Front Tracking Shot · Vaulting a Fallen Bicycle】

Cut to a low-angle wide tracking shot from in front of the female lead. The camera moves backward along the street, keeping her fully visible from the knees up and clearly bringing the obstacle ahead into frame.

An old delivery bicycle lies on its side by the roadside, jutting diagonally into the middle of the running path.

The female lead spots the bicycle, glances down to judge its height, and shortens her stride to adjust her takeoff point.

Her left foot plants firmly on the wet ground, her knee bends, and her center of gravity lowers. Then she pushes off with her left leg, both feet leave the ground, and she vaults over the lowest part of the bicycle frame.

Her body rises only after she takes off.

She lands right foot first, naturally bending her knee to absorb the impact. Her upper body dips briefly, then she immediately accelerates again.

Cut to an extremely brief medium shot from the side and rear: pursuer A braces both hands on the handlebars and vaults over the bicycle, B goes around it on the left, and C steps over the wheel on the right. Their movements are distinct but continuous, with no clipping or bodies merging.

【00:09.5–00:13.5｜Compressed Telephoto Perspective · Entering a Dead End】

Cut to a frontal telephoto shot from deep inside a narrow side alley.

The female lead quickly turns right off the main street into the alley. The telephoto lens compresses the space, making the pursuers behind her seem increasingly close. She plants her right foot to change direction, naturally leaning into the turn, while her sole kicks up a few droplets of water.

She runs a few steps forward, then suddenly realizes that the alley ends at a sealed brick wall.

Her speed drops noticeably, her sprint turning into two quick decelerating steps. She does not stop prematurely and does not appear instantly beside the wall.

She first looks at the sealed wall, briefly panicking; then quickly scans to the left and above, spotting a fixed metal toolbox beside the wall and the lowest rung of a fire escape about two meters above it.

The increasingly close footsteps of the pursuers and one brief shout are heard from behind, but do not generate any intelligible dialogue.

The music adds continuously rising high-pitched strings and electronic noise.

【00:13.5–00:17｜Low-Angle Medium Shot · Climbing Onto the Fire Escape】

Cut to a low-angle medium shot from the side beneath the fire escape, clearly showing the female lead, the fixed toolbox, the lowest rung, and the direction of the alley entrance.

The female lead immediately dashes toward the fixed metal toolbox.

She plants her right foot on the edge of the toolbox first. Her sole makes realistic contact with the metal surface, and the box gives off a dull metallic thud; her right leg pushes her body upward.

The female lead simultaneously reaches up with both hands.

Only after her body has risen do both hands grab the lowest rung of the fire escape. Her fingers close fully around it, her arms bear her weight, and her body swings slightly forward with the momentum.

She tightens her core, pushes off the wall with her left foot, lifts her right knee, and begins pulling herself toward the fire escape platform.

Pursuer A rushes closer from the edge of the frame and reaches for the female lead's right foot.

His hand reaches it only after she has drawn her leg in. It misses by about twenty centimeters; there is no physical contact. Feeling him close in, the female lead jerks her leg up, and her sole sweeps just above A's palm.

A, having failed to grab her, takes one extra step forward, then regains his balance. He must not fall for no reason.

【00:17–00:20｜Low-Angle Wide Shot · Temporarily Escaping】

Cut to a static low-angle wide shot from the bottom of the alley.

Using the strength of her arms and her feet pushing against the wall, the female lead pulls her entire body onto the first-level fire escape platform. Her chest, abdomen, and knees pass over the edge of the platform in sequence; she must not appear on the platform instantly.

Pursuers A, B, and C arrive beneath the fire escape one after another. The group remains at exactly 3 people. All three look up, searching for a route to continue the chase.

The female lead quickly stands, grabs the railing above, and continues climbing to a higher level. She glances down once. Her expression shows not triumph, but breathlessness, tension, and the alertness of someone who cannot afford to stop.

The camera tilts upward slightly, following her as she climbs out through the top of the frame.

The final shot retains the swaying metal fire escape, the three pursuers below, and the wet brick wall. The fire escape gives off a loud metallic rattle. The music hits a single strong accent at 20 seconds and then cuts off immediately, leaving the chase unresolved.

【Music and Location Sound】

Use lyric-free urban action-thriller instrumental music:

Low, heartbeat-like pulses
Fast electronic beats
Deep drum hits
Gradually rising high-pitched strings
A single strong accent at the end.

The music enters at low volume at 0 seconds, adds a beat as the chase accelerates at 2.5 seconds, increases the tension when she enters the dead end at 9.5 seconds, reaches its peak as she climbs at 13.5 seconds, then stops abruptly with the loud metallic rattle of the fire escape at 20 seconds.

The music must not drown out the realistic location sound.

Must include:

Four sets of running footsteps at different distances
The female lead's increasingly hurried breathing
The sound of shoes splashing through water
The slight rattling of the bicycle
The dull thud of a shoe contacting the metal toolbox
The friction sound of hands gripping the fire escape rung
The continuous metallic rattling of the fire escape
Distant traffic and urban ambient noise

生成一段20秒、16:9横屏、720p、高真实真人实拍质感的都市街头追逐动作短片。

采用紧张、快速但空间关系清楚的正常动作片剪辑。刚下过雨的傍晚旧商业街，天色进入蓝调时刻，沿街商铺大多已经关闭，金属卷帘门、旧砖墙、窄巷、外置消防梯和零散暖黄色店灯构成真实城市环境。湿润沥青路面反射路灯与招牌色光，但不出现可识别品牌或乱码文字。

【女主完整人物设计】

女主是22岁成年东亚女性，约168厘米，纤细、紧实、具有日常跑步训练形成的运动体型，动作敏捷但不是专业特工或超级英雄。

暖调自然肤色，保留真实毛孔、细小皮肤纹理与自然不对称；偏窄鹅蛋脸，眉骨清晰，平直浓眉，眼神锐利，鼻梁自然挺直，下颌线干净，右侧眉尾有一道很淡的小疤，胸部饱满，胸部轮廓和胸线明显。

黑色锁骨发扎成略松的低马尾。奔跑过程中马尾、碎发和衣摆根据速度与转向产生连续摆动；随着体力消耗，少量碎发逐渐贴在额头和脸侧。

服装固定为：

墨绿色哑光轻量防风夹克
深灰色U领紧身T恤
黑色直筒工装裤
深灰色防滑跑鞋
黑色尼龙斜挎小包
酒红色窄织带从右肩跨到左腰。

女主全程保持同一张脸、同一体型、同一发型、同一服装和同一个斜挎包。斜挎包始终属于女主，不能转移到追逐者身上。

女主的表演核心是：

起初警觉
→ 确认被追后紧张加速
→ 面对障碍快速判断
→ 进入死巷时出现短暂慌乱
→ 发现消防梯后重新集中
→ 险些被抓住
→ 暂时脱身但仍不敢放松。

通过一次回头确认、急促呼吸、短暂扫视环境、身体重心变化和抓握动作表现紧张，不使用夸张瞪眼、尖叫或表情包式惊恐。

【三名追逐者】

追逐者固定为3名成年男性，均不持武器：

追逐者A：身材高大，炭灰色连帽卫衣、黑色长裤、黑色运动鞋，始终跑在最前方。

追逐者B：身材敦实，深蓝色牛仔夹克、暗黄色T恤、深色长裤，通常位于A后方左侧。

追逐者C：身材偏瘦，棕色旧工装夹克、灰色针织帽、深灰长裤，通常位于队伍右后方。

三人身份、脸、身材和服装不能互换。人数始终为3人，不得复制、合并、突然消失或增加新的追逐者。

【00:00–00:02.5｜建立全景·发现追兵】

使用街道斜侧方固定全景，完整交代湿润商业街、路口、右侧窄巷入口和远处外置消防梯的大致空间方向。

女主从画面左后方的一条小巷突然冲出，进入主街后下意识回头确认。

追逐者A紧接着出现，追逐者B和C间隔不到半秒从同一巷口冲出。三人形成清楚的前后追逐队形。

女主确认追兵后呼吸明显收紧，身体前倾，立刻向画面右侧加速。追逐者沿同一方向追赶。

音乐从低沉脉冲开始；先听见女主鞋底落地和踩过浅水的声音，再听见后方三组逐渐接近的脚步。

【00:02.5–00:06｜侧面轨道跟拍·距离缩短】

切到街道侧面的中远景高速轨道跟拍，镜头与女主平行向右移动，保持女主完整身体和后方三名追逐者同时可见。

女主摆臂加速，斜挎包与酒红织带贴着身体连续弹动。她只回头一次，用极短时间确认追逐者A正在缩短距离，随后立即把视线转回前方。

三名追逐者保持固定身份和相对队形：

A在最前
B位于左后
C位于右后。

女主经过一片积水，右脚先踩入浅水，水花在脚掌接触以后向后飞溅；鞋底没有打滑，她顺势继续奔跑。

B踩过同一片积水时脚步略有停顿，使他暂时落后半步。音乐加入快速低鼓和短促电子节拍。

【00:06–00:09.5｜低机位前跟·跨越倒地单车】

切到女主前方的低机位广角跟拍，摄影机沿街道向后移动，保持女主从膝盖到头顶完整可见，并让道路前方障碍清楚进入画面。

一辆倒在路边的旧配送单车斜伸到跑道中央。

女主先看到单车，视线向下确认高度，缩短一步调整起跳点。

她的左脚真实踩稳湿润地面，膝盖弯曲，身体重心下沉；随后左腿发力，双脚离地，从单车车架最低位置上方跨过。

起跳发生以后身体才上升。

她落地时右脚先接触地面，膝盖自然弯曲吸收冲击，上半身短暂下沉，随后立即重新加速。

切到极短的侧后方中景：追逐者A双手撑过单车把手并跨过，B选择从左侧绕开，C从右侧跨过车轮。三人动作不同但连续，不发生穿模或身体合并。

【00:09.5–00:13.5｜长焦压迫·进入死巷】

切到狭窄支巷深处的正面长焦镜头。

女主从主街快速右转进入支巷，长焦压缩空间，让后方追逐者看起来越来越近。转弯时她用右脚踩地改变方向，身体自然向弯道内侧倾斜，鞋底带起少量水珠。

她向前跑出几步，突然发现巷道尽头是封闭砖墙。

女主速度明显降低，脚步从冲刺变成两次急促的减速步。她没有提前停下，也没有瞬间出现在墙边。

她先看向封闭墙面，短暂出现慌乱；随后快速扫视左侧和上方，发现墙边固定的金属工具箱，以及工具箱上方约两米高的消防梯最低横杆。

后方传来追逐者越来越近的脚步和一声短促呼喊，但不生成明确对白。

音乐加入持续升高的高频弦乐与电子噪声。

【00:13.5–00:17｜低角度中景·跃上消防梯】

切到消防梯下方的侧面低角度中景，清楚展示女主、固定工具箱、最低横杆以及巷口方向。

女主立即冲向固定金属工具箱。

她的右脚先踩上工具箱边缘，鞋底与金属表面真实接触，箱体发出一声沉闷金属响；右腿发力推动身体上升。

女主同时向上伸出双手。

双手在身体上升后才抓住消防梯最低横杆。手指完整闭合，手臂承受体重，身体根据惯性向前轻微摆动。

她收紧腹部，左脚蹬住墙面，右膝向上抬，开始把身体拉向消防梯平台。

追逐者A此时从画面边缘冲近，伸手抓向女主右脚。

他的手在女主收腿之后才到达，只差约二十厘米，没有发生身体接触。女主感受到逼近后急促收腿，鞋底从A手掌上方掠过。

A因为没有抓到而向前多冲一步，随后稳住身体，不能无原因摔倒。

【00:17–00:20｜仰拍全景·暂时脱身】

切到巷道底部的固定仰拍全景。

女主依靠双臂拉力和脚蹬墙面的力量，把身体完整翻上消防梯第一层平台。胸口、腹部和膝盖依次越过平台边缘，不能瞬间出现在平台上。

追逐者A、B、C先后到达消防梯下方。人数保持为3人，三人抬头寻找继续追赶的路线。

女主迅速站起，抓住上方扶手继续向更高一层攀爬。她回头向下看一眼，脸上不是胜利，而是喘息、紧张和不敢停下来的警觉。

摄影机小幅向上仰摇，跟随她爬出画面上沿。

最后一个画面保留不断摇晃的金属消防梯、下方三名追逐者和湿润砖墙。消防梯发出响亮金属震动声，音乐在20秒形成一次强烈重音后立刻停止，留下未结束的追逐悬念。

【音乐与现场声】

背景音乐使用无歌词的都市动作惊悚器乐：

低频心跳式脉冲
快速电子节拍
低沉鼓点
逐渐升高的高频弦乐
结尾单次强烈重音。

音乐从0秒低音量进入，2.5秒追逐加速时加入节拍，9.5秒进入死巷时提高紧张度，13.5秒攀爬时达到峰值，20秒随消防梯金属重响突然停止。

音乐不得盖住真实现场声。

必须保留：

四组不同远近的奔跑脚步
女主逐渐急促的呼吸
鞋底踩水声
单车轻微震动声
鞋底接触金属工具箱的闷响
手掌抓住消防梯横杆的摩擦声
消防梯持续晃动的金属声
远处交通与城市环