Filled With Air And Hide Under Your Seat

Riddle: I’m filled with air and hide under your seat; sit down, and I’ll give you a treat. What am I?

Answer: A whoopee cushion. A classic prank tool, it’s a staple of April Fools' Day mischief.

Source: https://www.riddles.com/index.php/991

I’m filled with air and hide under your seat; sit down, and I’ll give you a treat. What am I? — Filled with air and hide under your seat by Anonymous v1.

Riddle: I’m filled with air and hide under your seat; sit down, and I’ll give you a treat. What am I? Answer: A whoopee cushion.
A classic prank tool, it’s a staple of April Fools' Day mischief. — by Anonymous v2.