It's Water War! Jimmy Fallon's most bizarre and icy cold game yet! A game of chance, and um, hydration, Water War pits the 'Tonight Show' host against an especially down-for-whatever guest (after all, what sort of person would be okay with having water poured all over them on national television? a cool one, that's who!) in a battle to see who can get more soaking, sopping wet. That's the aim of the game, right? No? Then 'Blackhat' star Chris Hemsworth lost? What kind of world is this?!