Response to 15 Wildest Office Pranks:
Six inch garlic herb sausage from that store in the mall that sells them wrapped in plastic. Cut 5 inch long deep groove in sausage and while holding plastic wrapper pinch sides so it opens up the groove. Lift coworkers ceiling panel in their office and place sausage above panel on their first day of two week vacation. Turn off AC to their office if possible. Shut office door and do not open for two weeks. Try to leave town on business on their first day back from vacation. Never to be forgotten.