A single feather drifts gently down and lands on a soft cushion, but produces a thunderous booming crash — violating the proportionality between kinetic energy and radiated acoustic energy.
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 feather
- a soft cushion
Event: a feather drifts down and lands on a soft cushion
Audio presence
- a feather
- a soft cushion
Sound: a thunderous booming crash
Key standards
Visual physical commonsense (V-PC)
- A single feather visibly drifts gently down through the air and lands on a soft cushion with continuous physically plausible falling motion.
- The feather remains a small lightweight feather and the cushion remains a soft cushion throughout the clip, without either becoming a heavier or harder object.
Audio physical commonsense (A-PC)
- The landing sound is a thunderous booming crash with deep low-frequency boom and high amplitude, consistent with a massive heavy impact.
Cross-modal physical commonsense (AV-PC)
- The thunderous crash sound onset aligns in time with the visible moment the feather contacts the cushion.