Related Clues:

• Sound in a famous Alka-Seltzer ad
• Sit (down) undaintily
• Bubbles
• Effervescent drink
• Sit clumsily (with "down")
• Unceremonious fall
• Effervesce
• Butt-hitting-beanbag chair sound
• Penny-in-the-wishing-well sound
• Fall carelessly
• Sound associated with ripples
• Sound repeated before "fizz fizz," in ads
• Champagne?
• Hiss like carbonated liquid
• Sound of a stone hitting water