Find a sleeping person, fill their hand with shaving cream and then tickle their nose.

 859

0  

Change the coffee in the office coffee maker to decaf.

 1541

1  

Place a pair of pants and shoes inside the only toilet stall in a rest room to make it appear someone is using it all day.

 803

1  

Install the Blue Screen of Death screen-saver on someone's computer.

 898

3  

Hide all of the desktop icons on someone's computer and replace the monitor's wallpaper with a screen-shot of their desktop.

 977

0