Frenchman Julien Dupont is a legend in the motorcycle trials world. But sometimes, he just wants to have a little fun. So what does he do? He arranges for Red Bull to get him access to the Montaña Rusa, a famous wooden roller coaster in Mexico City. At one time, the  Montaña Rusa was the tallest roller coaster in the world.  Now, the 3/4-mile-long attraction is Dupont’s personal playground. Watch as he powers up the ramps, wheelies across sections, and does backflips. Yes, backflips on a roller coaster. Check it out below.