The hunky actor was challenged to the card game by show host Fallon — the consequences of which would result in the loser getting somewhat soggy.
"We're going to have a little water war," Fallon, 40, explained. "We'll play the card game war, but if you lose the hand, you get a pint of water in the face. The first to throw five glasses of water on their opponent wins, and gets to water cannon the loser."
"We played once before," Hemsworth, 31, replied to Fallon, trying to psych him out. "I believe I won," he added, confidently. But despite an initially even outcome, Hemsworth soon found himself on a losing streak.
When Fallon beat Hemsworth for the third time, he decided to pour his glass of water into Hemsworth's lap. "That wasn't bad," the Austalian hunk said, laughing.
But after his forth loss, Hemsworth accepted Fallon's invitation to swap the decks. The result? The Avengers: Age of Ultron actor lost the next round too!
Watch the whole segment in the clip above and check out Hemsworth's stripper moves (and amazing muscles!) as he's soaked by the water cannon and his shirt goes completely see-through!