Dwayne Johnson may have a tough-guy persona, but he's actually a pretty funny guy. Since breaking into the acting world in 2001, we've noticed that something very special happens whenever The Rock is around his costars: his prankster personality comes out. After costarring with Kevin Hart in Central Intelligence earlier this year, the actors developed quite the bromance, making for some freaking hilarious moments. Still, Kevin is just one of the many stars who's gotten a taste of the Brahma Bull's golden sense of humor.