Install the Blue Screen of Death screen-saver on someone's computer.
814
3
Write a message on an upside-down paper cup that alludes to something horrible being trapped under it.
Leave it on a coworker's desk or in a conference room.
1456
1
Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.
882
0
Find a sleeping person, fill their hand with shaving cream and then tickle their nose.
790
0
Change the coffee in the office coffee maker to decaf.
