This butt belongs to Dirk Auer. He's on a mission to do crazy things on in-line skates, and his latest stunt involved modding his blades and rocketing down the Mammoth rollercoaster in Stuttgart. Auer, whose leg muscles and courage must be hewn from a three-century-old oak, covered 860 meters in 60 seconds, reaching 56 mph on his 16-wheeler skates, which took him 110 hours to make.
Says the 36-year-old: "The roller caster is wooden and so unlike rides made from iron and steel there was always a chance of the odd nail or screw that would not be entirely flat. If the skates were to catch a stray nail then I could have fallen and I would almost certainly have died."
German Auer already holds the world record for speed — he and his rollerblades hit 190 mph as he was dragged behind a Porsche GT. Watch him go in the video below.