A heavy steel ball drops to the marble floor, yet the sound is a soft, muffled sponge thud with no ringing.
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Per-prompt rubric
Basic standards
Visual presence
- a steel ball
- a marble floor
Event: a heavy steel ball drops onto a marble floor
Audio presence
- a steel ball
- a marble floor
Sound: a soft muffled sponge thud
Key standards
Visual physical commonsense (V-PC)
- A heavy rigid steel ball visibly falls and lands on a hard marble floor with continuous physically plausible rigid-body motion.
- Both the steel ball and the marble floor remain visibly intact and unchanged in material throughout the clip.
Audio physical commonsense (A-PC)
- The impact sound is a soft muffled dull thud with the absorbent character of a sponge cushioning the strike, with no ringing or metallic resonance.
Cross-modal physical commonsense (AV-PC)
- The thud sound onset aligns in time with the visible moment the steel ball contacts the marble floor.