hello there.I'm faytree and i will show you how to prank your friend.
step1:
make sure you are using a window to make it more realistic because there is no way you can make BSOD on a mac

.
step2(optional):
turn off tool cursor on options
step3:
make sure your algodoo is not in full screen.
step4:
introduce this to your friend.(make sure you download this first before you introduce to your friend...)
step5:
told him to press F11 and watch (the algodoo skin will gone,cursor will gone and BSOD(don't worry press the enter button to fix it).
step6:
accuse him about this problem like "oh no! my computer!i use my own money savings to purchase that!you must fix it!" wait for a couple of seconds and press enter.When the algodoo went back to normal, laugh at him or her.
tell me how your friend react?
well that's for now folks cya!
-faytree