Watch Kristen Stewart and Jimmy Fallon Play Jell-O Shot Twister

Jimmy Fallon drank on the job on Monday's The Tonight Show, when the host played a round of Jell-O shot Twister with Twilight actress Kristen Stewart.

The premise of the game is like regular Twister, where players have to contort themselves to reach their assigned colored circle, but there's the added wrinkle of having to do a boozy shot of correspondingly colored Jell-O.

Stewart doesn't love the game -- she says she's full after three Jell-O slurps -- but she's a good sport. And Fallon allegedly loves to drink.