Of all the games that Jimmy Fallon plays with celebrities on The Tonight Show, slapjack has to be the funniest of the lot.
It’s almost like the traditional card game – only with added pleasure of watching the loser slapped silly by a gigantic prosthetic hand.
This time around it was Jake Gyllenhaal who on the other side of the mock blackjack table. The actor appeared on the show to promote his latest movie, Southpaw.
Find out who wins and who gets his head slapped off in the video above.