Mountain Bike Chase Loop Animation

Prompt

[MOTION STYLE] Emphasize snappy animation with lively energy, strong anticipation, overshoot, squash and stretch, and follow-through on hair and jacket. Give the movement a distinctive rhythm with variation in pacing: sharp compressions, sudden acceleration, delayed settle on hair and fabric. Physics are slightly exaggerated beyond reality, but the rider's footing and center of gravity don't break. Use motion blur, short afterimages and dramatic smear frames sparingly. ONE-SHOT (15s, 9:16) — one rider, one bike, flat-out speed, loop-ready. SCENE CONTEXT — EXACTLY 1 CHARACTER, 1 BIKE. NO DUPLICATES. No other people or bikes anywhere in the field. ACTIVE REFERENCES [Image 1] is the first frame. It defines the opening composition and <Hyo>'s appearance — a young woman with black hair in two low buns, burgundy windbreaker, olive mountain-bike shorts over grey leggings, orange gloves, seen from behind and already airborne and ALREADY FALLING off the dirt lip. The video starts exactly from this frame. Do not restage it, do not re-rise. GEO SPATIAL LAYOUT (locked): a harvested golden stubble field. A packed dirt track runs STRAIGHT AWAY from camera into the distance. The take-off mound is behind her at frame start; a landing ramp sits immediately ahead; a second smaller dirt lip sits further down the same straight track; the main take-off mound reappears at the far end of the same line. Three round straw bales stand beside the track frame-LEFT; a red barn and hedgerow close the horizon frame-RIGHT. Crisp bright autumn noon, luminous clear blue sky, stubble blazing gold. SPEED (mandatory): she rides FLAT-OUT the whole way, roughly 35 km/h. Ground, stubble, bales and track texture rush past the wheels and out of the bottom of frame fast. Her legs turn a fast continuous cadence; chain and spokes blur. Real-time speed or faster at every moment. [Stage 1] 0.0–1.5s — LANDING Initial state: <Hyo> is already descending, bike level, straw dust trailing behind. Primary event: she presses the bike down and both wheels slam the landing ramp almost together; suspension compresses deep, a burst of dust fires out sideways. End state: both wheels planted, suspension at full compression, her body squashed low over the bars. [Stage 2] 1.5–4.5s — REBOUND AND ACCELERATE Continue from the previous stage: same rider, same bike, camera still behind her. Primary event: the suspension springs back and she stands on the pedals, hammering a fast cadence straight down the dirt track, dust tail streaming behind her. End state: fully upright on the pedals at full speed, track running dead straight ahead of her. [Stage 3] 4.5–8.5s — FLAT-OUT RUN Primary event: she rips past the line of straw bales on her left; the bales, the stubble edge and the track texture streak past and out of frame; her buns and the hem of her windbreaker snap in the wind, settling a beat after her body. End state: the second dirt lip is now filling the lower frame ahead of her. [Stage 4] 8.5–11.5s — QUICK HOP Primary event: she pops the second lip, gets a short sharp half-second of air with the bike tucked, and lands both wheels immediately, a hard crunch and rebound without losing any speed. End state: back on the track at full speed, still accelerating. [Stage 5] 11.5–15.0s — RUN-IN AND LAUNCH Primary event: she drives at the main take-off mound, gloves tight on the bars, body loading as the lip rushes up under her front wheel, then the front wheel leaves the lip and she rises into the air. End state (loop-ready): the exact composition of [Image 1] — seen from behind, low angle, airborne off the lip, bike level, gold field below her wheels. CAMERA — one continuous chase shot. The camera rides roughly 3m behind her rear wheel at about 80cm height, matching her speed so she stays the same size in frame while the ground rushes underneath. Her BACK stays to the lens for all 15 seconds. No cuts, no zoom. The camera never orbits ahead of her, never swings to her side or front, never shows her face, never reverses. PHYSICS — true parabolas, honest suspension compression and rebound, dust and straw lifting and settling at their own weight. AUDIO — ASMR ambient/diegetic only: wind roaring past her ears, tyres crunching and drumming on packed dirt, suspension hissing through its stroke, fast freehub buzz and chain whir, stubble rattling the frame. No narration, no voiceover, no dialogue, no music. NEGATIVE / FAILED TAKE CONDITIONS — No slow motion, no hovering, no floating, no hang time longer than 1.5 seconds; any drifting or slow-motion feel = failed take. No front view, no side view, no face visible, no camera orbit = failed take. A second person or a second bike = failed take. A crash or a foot down = failed take. No summer clothing. No dark, dusk, foggy, sunset or night grading = failed take. No on-screen text, captions, logos or watermarks. No photoreal or 3D CG rendering. STYLE (locked): hand-drawn 2D anime, soft cel shading, lush painterly gouache backgrounds, crisp bright autumn noon, high-key daylight, luminous clear blue sky, warm radiant sunshine, glowing gold stubble, soft lens bloom, soft film grain, nostalgic hand-painted anime film look. Every frame bright, airy, well-exposed.