Watch a friend struggle with his mouse for 5 minutes before discovering this!

Make everyone wonder "How constipated can that man be to last 6 hrs straight on the can!"

Leave them a big, soggy brown present!

Give their car a bright new paint job (with sticky notes)

Or at least give it some class by redecorating it a bit (with cotton balls!)

Dip cotton balls in water and leave them to freeze overnight