When you've got a good talk show guest, you don't really need to put too much thought into the game you ask them to play. Whatever it is, they'll probably make it fun.
That seems to have been the thought process in The Tonight Show clip above, where John Oliver is tasked with going head-to-head against Jimmy Fallon in a game of "Ten in Twelve" — basically just taking turns to name 10 things in a category (e.g. "parts of the body") in 12 seconds.
Cue plenty of sarcasm from Oliver, some uncharacteristic cursing from Fallon, and a whole lot of giggling throughout.
