I have two, my friend and I were riding home from the arcade a long time ago (back when Donkey Kong was getting it's start and Mario did not have a brother or any other cute little friends). It was night and we didn't have any lights on our bikes. I am following at a safe distance behind my friend when suddenly he starts flying! His bike kept going and he was hangin in the air and then he dropped. Turns out he ran into a guy wire off a telephone pole that sloped up out of' the ground. I was trying so hard not to laugh but it was pretty funny. He turned out to be OK luckily.

My stupid thing was doing a wheely without having properly tightened the front wheel. I rode the wheelie for about 15 feet and then Gravity took over as I watched my front wheel role into a neighbor's yard. I then learned why BMX bikes have all those pads on them. Luckily the handlebars caught me in the chest and not the neck.