Using volleyballs and giant party cups (where does one buy those?), Fallon faced off against the Vampire Diaries star in a first-to-three contest. The rules were simple: Bounce the ball into a cup and your opponent has to chug a beer.
Jimmy quickly got ahead to a two-cup lead, but he got pretty cocky and began taking shots with his eyes covered. Check out the video to see if he pulled off the win in the end.
Nina also sat down with Jimmy for a more traditional interview on the talk show, although most of their chat detailed a recent monkey bite she suffered while she was abroad. Will she gain monkey-woman powers? Only time will tell.