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A starting pistol fires. The bang and visible puff happen together, and the runners react about a tenth of a second later.

C1-3-39 Steady State · sound_persistence principle: Causal (Wave)
Seedance 2.0ByteDance · proprietary
Kling 3.0 OmniKuaishou · proprietary
Veo 3.1Google · proprietary
LTX-2.3Lightricks · open
Ovi 1.1character.ai · open
JavisDiT++JavisDiT · open
MagiHumanGAIR-NLP · open
Per-prompt rubric

Basic standards

Visual presence

  • a starting pistol
  • runners

Event: a starting pistol fires and runners push off

Audio presence

  • a starting pistol

Sound: a pistol bang

Key standards

Visual physical commonsense (V-PC)

  • A visible starting pistol is fired with its muzzle pointing safely away from a row of sprinters at starting blocks.
  • The sprinters visibly push off from their starting blocks shortly after the pistol fires.

Audio physical commonsense (A-PC)

  • The pistol bang has the sharp crack and quick decay of a real starting pistol shot.

Cross-modal physical commonsense (AV-PC)

  • A single visible muzzle puff and a single audible bang fire together, with the smoke source attached to the pistol.
  • The sprinters visibly begin their push-off approximately one-tenth of a second after the bang.