Alicia Vikander, the Swedish Oscar winner and Jason Bourne costar, shared a baffling Swedish drinking game with Jimmy Fallon on Thursday's Tonight Show.

The concept is simple: Attach a pen to the end of a string and tie it around your waist. Opponents then race to see who can drop his or her pen into a bottle on the floor first. The results include uncomfortable squats, uncontrollable giggles and a few racy jokes.