That my friend was the sickest shit I have heard in months. And for that I congratulate you.
But OP I have dealt with this before with guys at work. Harmless but effective is the way to go.
- Tie a box to a string and tie the string to the hook under his car. then hide the box under his car. Guaranteed to get pulled over. Seen it.
- Go to you're local supermarket and buy some fresh fish. Put it in a garbage bag and hide it under the passenger seat or any good hiding location.
- Go to you're local pet store and buy 100 or more live crickets, dump them in, it will take forever for him to find them all, and the chirping will get ridiculous.
- Bacon fat on the windshield wipers.
- Run a for sale add for his car in your local paper and craigslist. Make the car cheap so you he gets a lot of calls.
- If his car is light, get a bunch of your friends and pick the car up and put it sideways in a parking spot.
- I heard this one about buying a watermelon, cutting it in fours, then jacking up each tire and lowering the tires onto the slices of watermelon. Supposedly your tires just slide, and you have to get out and jack the car up and reverse the process.