Just a simple prank to pull on your friends calculator!!!
Step 1: Prank 1
In this prank the calculator will be completely frozen.
:Disp "HAHA HAHA HAHA
:Disp "NOW YOU CANT PRESS
:Disp "ANY BUTTONS
As you can see it just is an infinite loop... If you would like to, you can just not put any of the Disp commands and start at Lbl A to make it faster!