Snakes in a Hotel

Build a fake hotel bed that is entirely hollow.



Have it look like it's just a normal bed with sheets on the side and everything.

Fill the hollow bed with snakes (like in Indiana Jones: last crusade)



Rig the sheets on a pulley system to rip in the center and pull off to the side.

Create a fake prank for the contest winner so bam thinks that they are going to shoot a different prank the next day.

Either have bam lie on the bed with a piece of stunt glass or something along those lines and have it break by remote (possibly the remote control for the tv)



or



Have someone push/tackle Bam onto the bed into the snake pit.

The side of the bed will have plexi-glass pieces that can easily be pulled up creating a glass room for bam to be with the snakes in.

If you want to go the extra mile you could drop a box of mice in there with him.