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A person places their ear on a railroad track and hears the distant rumble of a train approaching long before the sound arrives through the air.

C1-3-13 Steady State · sound_persistence principle: Solid as Medium (Fluid)
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 person
  • a railroad track

Event: a person presses their ear to a railroad track

Audio presence

  • an approaching train

Sound: distant train rumble through steel

Key standards

Visual physical commonsense (V-PC)

  • A person lies down and places their ear directly onto the rail with continuous motion.

Audio physical commonsense (A-PC)

  • A low-frequency rumble consistent with sound conducted through solid steel is audible while the ear is in contact with the track.

Cross-modal physical commonsense (AV-PC)

  • The track-borne rumble onsets when the ear contacts the rail and substantially diminishes when the ear lifts off.