1.

This coworker, who replaced their coworker’s office chair with a toilet:

2.

This coworker, who pulled a cruel, cruel April Fools’ Day prank on their coworkers:

3.

This coworker, who filled their coworker’s cubicle with packing peanuts:

4.

This coworker, who replaced their coworker’s degree with, well, another:

5.

This coworker, who pinned tampon wrappers to their coworker’s fan:

6.

These coworkers, who put their coworker’s decorative giraffe in a compromising position:

7.

This coworker, who froze their coworker’s stapler in a block of Jell-O:

8.

This coworker, who wrapped everything in their coworker’s office in foil:

9.

And this coworker, who wrapped everything in their coworker’s cubicle in wrapping paper:

10.

This coworker, who put this printout in the office microwave and scared the crap out of everyone:

11.

This coworker, who made their coworker play the game no one wants to play:

12.

This coworker, who tied rubber chickens to their coworker’s front grill:

13.

This coworker, who put this creepy horse head mask thing on their coworker’s desk:

14.

This coworker, who put googly eyes on their coworker’s charger:

15.

And this mystery coworker, who put this note on the employee board and pretty much pranked everyone: