Related Clues:

• Sound of water falling
• Sound preceding a ripple, perhaps
• Sound of something small falling into water
• Undesirable sound at a stone-skipping contest
• Stone skipper's dreaded sound
• Sit down ungracefully
• Jump onto a beanbag chair
• (Kerplunk!)
• Sound of a coin dropping into a fountain
• Fall back into a beanbag chair
• Kerplunk!
• Hit-the-water sound
• Dropping-into-liquid sound
• Sound of a marble dropping into milk
• Sound of a stone skimming failure