A jump is something put into Supercross and motocross tracks to enable riders to launch of the ground. They are usually big bumps, somewhat bigger than whoop-de-dos. There are three main sets of jumps: the single jump, the double jump, and the triple jump. Single jumps have only one jump, double jumps two, and triple jumps three. Riders will often take different lines through a series of jumps. While one rider might triple, and then double through a series, another rider might triple, single, and single. Triples are usually only done by advanced riders, as they take increased skill. Beginners usually don't take jumps at all, and simply ride over every jump. There have been known instances of people doing quadruple jumps, though they are not very common.