Daniel Radcliffe [1] stopped by The Tonight Show on Tuesday night to promote his upcoming film, Victor Frankenstein, this year's reboot of Mary Shelley's Frankenstein [2]. During his appearance, things got a little wet when Daniel and Jimmy opted for a round of "Water War," a game that both Chris Hemsworth and Jake Gyllenhaal have played [3] in the past. Watch what happens in the clip above, and then check out the trailer for Victor Frankenstein [4], which hits theaters on Nov. 25.