The reaction is always the best part of a prank, except with this prank you usually don't get to see the initial aftermath. But I get a laugh every single time I do this anyway.

I stuck this on my dad's car a few days ago. He still has not seen it.

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It's awfully hilarious hearing the stories from after the prankee realized this was on the back on his/her car, or who told him/her and how long it's been there.

Try it to your friends or your family. It's more funny when they come up to you and ask, "Who the heck would do that to me?!"