collapse

contract

shrivel

reduce

lessen

decrease

compress

condense

release air

expel air

empty

flatten

puncture

sink

depressurize

exhaust

void

evacuate

bouncy castle

pool toy

balloon

inflatable

break

broken

boat

life raft

squeeze

diminish

dwindle

squeak

fly around room

silly

funny

comedy

clown

joke

prank

fart

whoopie cushion

air escaping

leak

gas

hiss

stream

gust

blast

breeze

puff

air escape