The prank is one of the most cherished traditional forms of expression around the world, from Japan to the Middle East to the good ol' US of A. Without them, how would people settle their disputes with one another while having a good laugh at the same time? Every time a new phenomenon enters our lives, new pranks emerge that can be performed with it. We at Wonderhowto love pranks as much as anybody, and to that end we've scoured the internet for videos demonstrating the proper setup and execution of all sorts of pranks, from the more traditional passed-out-roommate style to the more 21st-century computer and cell phone pranks. However you want to lighten your day by making someone else's worse in a funny way, Wonderhowto will show you how to do it. This video show you how to use powerful magnets (these came from an old computer hard drive) to make someone think that they've left something important on top of their car without damaging it in any way.