Update! On a second view, I think you will need more than just guts to be good at this. Good pranksters are philosophers at heart; not only do they turn social

Update! On a second view, I think you will need more than just guts to be good at this. Good pranksters are philosophers at heart; not only do they turn social norms on their head, but they also have strong sense of irony. You and your friends are breaking character left and right. It's you jumping into someone's jeep, not your character. Create a character, learn method acting and always ask yourself "What would Andy Kaufman do?" :-) Create the character, be him, and follow up with a few more "Jumping into X" videos (not just Jeep); start with an "Jumping into an stroller", for example. Or jump into a cage in a zoo (starting perhaps with the much easier "doggy day care" ;-) Open your eyes.