SL-12 / Bodies in Motion

The Spiral

A tight spiral, a contested catch, and a run to the end zone.

The brief

A quarterback releases deep, the ball spirals downfield, a receiver adjusts, catches in traffic and turns upfield for the score. This is a multi-shot sequence — the ball has to connect the cuts.

Why it's hard

The spiral is the tell. A football rotates on its long axis while following a ballistic arc, and models usually give you a ball that tumbles or slides through the air. Add pads, helmets and contact between multiple players and the difficulty compounds.

Skill Tests

05 / 28

Animal anatomy Human anatomy Biomechanics Physics & mass Water simulation Crowd dynamics Multi-shot continuity Face consistency Camera movement Unbroken take Motivated lighting Cutting rhythm Hands & fingers Hair & fabric Reflection & refraction Scale & depth Impossible geometry Period accuracy Music sync Aging & time Natural asynchrony Eye-lines & gaze Particle behaviour Motivated light source Consequence & persistence Time manipulation Graphic-layer discipline Colour as storytelling

Every challenge is scored against the same vocabulary, so you can compare them. Lit cells are what this one tests.

Success criteria

The ball spins on its long axis throughout the flight — a true spiral, not a tumble.
The catch involves hands, not a magnetic snap of the ball to the chest.
Contact between players transfers momentum instead of players clipping through each other.

Starter prompt

Built with the CEMI MediaMax system for Google Veo 3.1. Prompts stay in English — that is the language these models take instructions in. Treat it as a starting point and start varying it.

football-touchdown

Overcast December afternoon, a stadium with a chewed-up grass field, mud in the hash marks, breath visible in the cold. A quarterback in a white jersey steps up in a collapsing pocket, sets his front foot, rotates hips then shoulders, and releases over the top; the ball leaves in a tight spiral, nose rising then tipping over at the apex. Downfield the receiver tracks it over his outside shoulder, extends both hands away from his chest, secures it against the forearm, tucks and turns upfield in one motion, then runs through an arm tackle to cross the line. Camera: 200mm from the sideline, handheld, panning with the receiver and jolting once as he cuts. Dirty foreground: a blurred lineman's shoulder pad and the yard-marker chain crossing the lens. Register of DP Roger Deakins' flat overcast contrast — no stadium glow, mud and grass ground into the fabric.

Style reference: Roger Deakins (DP), flat overcast contrast

Why it's built this way

The spiral is described as physics (nose rising, then tipping at the apex) rather than as an adjective, and the catch is broken into four actions so the hands do something specific instead of magnetically absorbing the ball. Flat December overcast with mud is a deliberate refusal of the golden-hour, glowing-stadium default that AI reaches for with sports. Vary the lens length — the 200mm compression is what makes it read as broadcast; a 35mm on the field makes it read as drama.

Watch for

The ball wobbling or teleporting into the receiver's chest, and jersey numbers melting between frames; generate the throw and the catch as two clips if the single take keeps breaking the ball's flight.

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