Jake Gyllenhaal [1] will be in theaters this weekend in Nightcrawler [2], but you can see him now in this clip from The Tonight Show Starring Jimmy Fallon! The star stopped by to promote his upcoming thriller, but he got roped into a rousing game of Water War. Spoiler alert: both men get soaked, and Gyllenhaal looks pretty great in a wet button-up. Take a look at the video below, and catch up with more of Fallon's greatest skits [3].