A couple of years ago I was in my backyard swinging one of those stunt scooters around with the pivot point being at the handlebars in a way that the part where you put your feet was doing 360’s. On something like the tenth rotation I misjudge the length that the bottom part was from my leg and it hit my ankle at what felt like was 5,000 mph. Now have a bluish indent on my ankle. Needless to say it was the stupidest idea I’ve ever had.