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Keys fall onto a tile floor with a sharp metallic jangling. Then fall onto thick carpet with only a soft muffled thud.

C2-1-48 Event Transition · source_body principle: Soft Material Absorption (Material)
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Per-prompt rubric

Basic standards

Visual presence

  • keys
  • a tile floor
  • thick carpet

Event: keys fall onto a tile floor and onto carpet

Audio presence

  • keys
  • a tile floor
  • carpet

Sound: keys landing

Key standards

Visual physical commonsense (V-PC)

  • A bundle of keys falls under gravity onto a hard tile floor first, then keys fall onto thick carpet.
  • The falling objects remain a coherent set of keys throughout the clip.

Audio physical commonsense (A-PC)

  • The tile landing produces a sharp bright metallic jangle.
  • The carpet landing produces a soft muffled thud noticeably quieter and duller than the tile landing.
  • Each landing sound is the natural impact of keys striking its surface.

Cross-modal physical commonsense (AV-PC)

  • Each landing-sound onset aligns in time with a visible key impact on its corresponding surface.