That’ll Show My Ex!
Here’s a prank you can pull on your ex that he or she will absolutely love! If you went through a bad breakup and want revenge, then print a bunch of posters that have their contact info on them. The poster should promote a fictional Chewbacca Impersonation Contest, where the best roaring sound wins a prize.
If you really want to make the prank a memorable one, ask the “contestants” to call their number between 12 and 3 AM. You might get a no-contact order placed against you, but it’ll be worth it if it causes your ex to lose sleep.