You need three things: someone you hate, access to his car and polystyrene (e.g. Styropor or Styrofoam) packaging foam.
Crumble all the polystyrene into very tiny pieces and sneak into someone’s car. Now, pour a couple of hands full of the polystyrene into all the air vents and direct them upwards.
Before leaving the car check for tracks and remove any polystyrene piece that might be visible. The car needs to look as entered. Don’t forget to turn the ventilation to full blast before you go.
You need to have an excuse to hand around the car when ignited. You don’t want to miss this moment.
Maybe you got a friend who will be given a lift. Make him take photos, while entering the car he could claim that he needs to check something on his camera.
This prank works well for a wedding! It’s up to you if you want to do this right before church or rather afterwards or even next day. This makes a great bachelor prank too, but it’s actually more fun with people who don’t expect to be pranked.
Like the bride’s parents for instance, right the moment when they pick up the wedding cake and mom wants to carry it in her lap for the short ride home.
Tell us if it worked and which divorce lawyer we can call for an entry into the Guinness Book of Records for the fastest divorce after a wedding prank.
Variations: Buses, vans (packed with 8 people right before taking off for vacation), or you can just the stuff into someone’s umbrella on a rainy day…