Rob Dyrdek has a special present for Justin Bieber in the season premiere of 'Fantasy Factory' (Mon., 10:30PM ET on MTV). But before he receives the mystery gift hidden under a large tarp, the teen superstar must prove he's "crazy enough to have it."

Bieber happily obliges with various stunts on wheels. He grabs a bicycle and launches up a ramp into the foam pit. Next, Dyrdek drives a go-cart at high speed toward the foam pit. Bieber skateboards close behind him, hanging on to a rope attached to the back of the cart. Dyrdek veers off just before the ramp, and Bieber soars up and into the pit. "You're makin' me so proud right now!" shouts Dyrdek.

His last feat is to jump the go-cart itself into the foam pit. Easy. His prize? A suped up three-wheel go-cart personalized with the Bieb's initials.