Perfect Prank

I think a really funny prank is to invite someone over and grease up the long stairwell to the basement. Then, pretend to want to show them something in the basement and just watch the show as they slip, tumble and roll down the steps, just like on those knee-slapping videos on social media. If they look like they have a busted arm or leg, I'll usually just go grocery shopping or to the cinema, because I don't like looking at that. Generally they have made their way out of the house by the time I get back.