Iranians play jokes on each other on the 13th day of the Persian new year (Norouz), which falls on April 1 or April 2. This day, celebrated as far back as 536 BC, is called Sizdah Be-dar and is the oldest prank-tradition in the world still alive today; this fact has led many to believe that April Fools’ Day has its origins in this tradition. Everyone who has ever used a Mac has seen – and feared – the “Spinning Beach Ball Of Death“. And having it pop up during your TED talk is a fate we would wish on no one. But why not use this fear and turn into a wonderful TED prank. April Fools’ day is fun, tickles people’s creativity and inspires pranks and gags which are worth spreading.