Mark Wahlberg and Jimmy Fallon Play “Slapjack,” Hit Each Other With Giant Fake Hand—Watch Now!

Mark Wahlberg and Jimmy Fallon got a little slap happy on Wednesday’s Tonight Show—literally!

The Gambler star joined the late-night host for a game of “Slapjack,” a high-stakes game of blackjack where the loser of each round gets smacked in the face by his opponent with a giant rubber hand.

“You should’ve told me [we were playing],” said Mark laughingly. “I would’ve brought my prosthetic penis from Boogie Nights! I could’ve…just slapped you in the head with that thing!”

“No, please,” said Jimmy. “I can’t even see those memes online. Thanks for thinking about that, though.”

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Mark dealt first, and it was quickly apparent that the 43-year-old father of four knew the game well. Jimmy wasn’t sure whether or not to call the actor’s bluff. “You’re like a professional gambler now,” he said. “I don’t know what to believe—you just want to slap me!”

“Hey, I’m not Ben Affleck—I’m not counting cards,” Marky Mark quipped. (For context: Bendid confess to counting cards back in a September interview with Details. While not illegal, it is often frowned upon. As the Runner, Runner star put it, though, he simply “took some time to learn the game and became a decent blackjack player. And once I became decent, the casinos asked me not to play blackjack.”)

Obviously, Mark didn’t hit hard. In fact, the late-night host kept right on grinning through the slap. “Aw,” said Mark, watching the slow-motion playback. “Look at that smile! You’re a handsome fella.”

He remained a good sport, too, as the 40-year-old comedian got to get a slap of his own in. “I definitely should’ve brought the penis,” joked Mark.

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“If I had a nickel for every time someone said that,” Jimmy said, not missing a beat.

The friendly game kept going, but Mark’s superior “Slapjack” skills became more and more apparent. After slapping Jimmy yet again, he reassured the father of two, “Your hair still looks good.”

The game continued on, but did Jimmy turn his luck around? Or did Mark walk away as reigning “Slapjack” champ? Watch the Tonight Show clip above to find out!

The Gambler hits theaters Dec. 25.

(E! and NBC are both part of the NBCUniversal family.)