Zac Efron [1] dropped by The Tonight Show Starring Jimmy Fallon on Wednesday night to promote his latest film [2], Neighbors 2: Sorority Rising. During his stop, the Hollywood hunk [3] played a fun round of "Water War" with host Jimmy Fallon, and things got a little wet, to say the least. At one point, Jimmy even tossed a glass of water straight at Zac's pants. Prepare to swoon and laugh together and watch the clip above, then check out Zac's brutally honest interview with Elle magazine [4].