The Whoopee Cushion is a 4th Generation weapon. It works like the Gas Canister from the 3D games, except that it emits gas every time it bounces. When it stops moving, a Grenade-like explosion occurs. With the Whoopee Cushion, you can cover a bigger area, and poison Worms on different parts of the landscape. So far, the Whoopee Cushion has only appeared in Worms Clan Wars and Worms Battlegrounds.