Empty a mayo jar, fill with vanilla pudding. Walk around eating it with a spoon...MMMMMMMMM
Fill a bowl with M&M's and Skittles, watch reactions
Work in a industrial shop? Smear limburger cheese on drill press or lathe lights, OOOO oh that smell
Poke a hole in shop stool padding, pour water in foam
Tape a canned air horn to bosses office chair post so that when he sits the seat lowers on the button and hope you don't get fired
"Lazy people think of the easy way to do the hard stuff"