There's pulling someone's chair out just as they're about to sit down, or unscrewing the top of the slat shaker. Then there's making someone think they're being chased by a velociraptor.
Japanese game shows have always gone the extra mile when it comes to performing the perfect prank, but this Jurassic Park-esque sequence sets the bar to new heights. Yes, the poor victim probably does see the pair of human legs protruding from underneath the dino-suit, but what normal human is going to hang around long enough to question this when a dinosaur is storming down a corridor at you?
To perform this prank yourself, you'll need an empty office block, a few convincing extras for running and screaming work, a velociraptor suit and a hapless Japanese man. And probably a psychiatrist to help them piece their fear-shattered life back together afterwards.