Jimmy Fallon's love for turning basic drinking games into outsized (often, quite literally) versions of themselves is well documented, but the 'Tonight Show' host just might have reached the apex of his drinking game adoration when he challenged Pitbull (Mr. Worldwide, please) to a round of Giant Duff Beer Pong. Wait, why Duff? Because Fallon and his show have been camped out at Universal Studios in Orlando all week, and yes, this game is all about Duff Beer, the favorite fictional beer of 'The Simpsons.'