Might have been fake, but...
I am sick of the roulette as well and I don't believe Raven got bit by the snake. That was bad acting, and we never saw the bite. He then used that hand to pull up the necklace...seemed to remember and switched hands quickly.
I thought, too, that he probably was just upping the "danger" of the effect by pretending to get bit, since it was the non-poisinous snake's basket he stuck his hand in. Also, if you noticed his parents in the audience, his mother looked real nervous, but his dad seemed to be re-assuring her, like he knew what was really happening. After all, if he really got chomped by a snake, I think his parents would have started freaking!
I'll give him props, though. Whether he actually got bit or not, he stuck his hand in a basket with a snake, and that takes some big-time kahones! Plus, his presentation is pretty good.
The guy right before him, with the voodoo doll, I really enjoy his style. The effect isn't as spectacular as the snake one, but he has good charisma and good command of the stage.