In the latest episode of the Tonight Show Starring Jimmy Fallon special guest Stephen Colbert has popped in for a game of ‘Truth or Truth’ and proven that his poker face is something that fabled legends are made of. While answering questions with flawless aplomb, he manages to show not even the slightest crack when talking about his relationship with a horse or lack of underwear. Meanwhile, Jimmy Fallon can barely keep himself together and starts delivering his lines with an ‘I’m trying so damn hard not to laugh’ warble, and has to hide behind a mug of water.