He talked Cruise, who was there to promote his new movie, Oblivion, to play a game of egg roulette!
Fallon put out a carton of eggs, explaining that eight were raw and four hard boiled. They were to take turns cracking the eggs on their heads, and the first one to crack two raw ones was the loser.
"I told you I didn't have a good feeling about this, man," Tom laughed as she smashed his first egg and it turned out to be raw.
It went downhill from there for the superstar, and you can watch the hilarious bit here!
Late Night With Jimmy Fallon follows The Tonight Show on NBC.