Since we all know Bam is terrified of Snakes I figured this would go above and beyond.
Step 1 The Proof
Sneak into his hotel room while he's asleep and place the cameras.
Step 2 The Initiation
Set loose some snakes (any kind) across the floor but make sure he has room to hop over and get to the door. Put a few in his bed
Step 3 The Exit
Step 4 Pennies!
Penny the door. (If you're not familiar with that it's when you lodge pennies in the cracks of the door to keep people locked in. The only way to open the door is to break it down or remove the pennies)
Step 5 Wait
Give him some time to freak out a bit. Let the cameras catch some good reaction footage.
Step 6 De-Penny
Unpenny the door.
Step 7 Sour Antiquing
When he opens the door have someone on the other side to throw a container of piss in his face and another person to throw flour on him. Causing it to stick.
Step 8 Cue Wee Man
For some reason this prank wouldn't be perfect without Wee Man in a little clown costume blowing a party horn. So throw that in for the finale.