Funny office pranks that I will never try.
"Disassemble a musical birthday card and carefully tape it underneath a coworkers chair so that when the chair is leaned back, the card activates. It took more than four hours for one coworker to discover the source of the intermittent noise!"
"Subtle in execution, but so hot when it yields results. Change the AutoCorrect on a coworker’s Word settings such that when he types in, say “facilitate,” it gets auto-corrected to “faliatiate”. Don’t have the patience to wait for him to type facilitate? Change “the” to “teet”, and so on."