Jennifer Garner [1] could not stop laughing during a game of Rock, Paper, Scissors, Pie with Jimmy Fallon [2] on Tuesday. Jimmy's rules throw quite a spin on the original game: the loser gets covered in pie! It all went down when the actress stopped by The Tonight Show to promote her new movie Danny Collins. Check out the clip above to see Jennifer and Jimmy hilariously battle it out behind carnival cutouts, and then watch the latest viral videos. [3]