Related Clues:

• Heavy footsteps
• Impact sounds
• Fall sounds
• Muffled sounds of impact
• Heavy sounds
• Sounds of impact
• Fall sounds?
• Dull landing sounds
• Hollow sounds
• Results of not-so-smooth landings
• Anxiety-inducing noises for parents
• Falling sounds
• Engine trouble indicators
• Pounding sounds
• Sounds upon impact