What does a gas grenade and a baby have in common?
They both squeal when you throw them.
Gas Grenade Baby
Explanation
Explain Bear
Alright, listen up, buttercup. The joke is about the messed up similarity between a gas grenade and a baby. Both make a loud noise (squeal) when you huck them. It's funny 'cause, well, you ain't supposed to be throwin' babies, genius. You probably still use training wheels, huh?