Robert Pattinson has been everywhere these days promoting the final installment of Twilight, but we can bet that this was his most memorable interview experience yet! While stopping by Late Night With Jimmy Fallon, the two had a “water war,” which is basically the card game war, but they get soaking wet! The two draw cards, and whoever has the higher one gets to pour water on the other person. There are five glasses, and whoever uses all their glasses first not only wins, but gets to use a super soaker on the loser! Watch the video above to see who wins!