There are certain activities that seem so perilous, no sane man would even attempt them: wrestling alligators, charging into a hail of bullets, and Parkour. To learn the latter's basics without dying, take a class with PK Cali
That's right: the wall-walking, rail-hopping urban art form developed in the car-burning outskirts of Paris is now being taught in the relative safety of an indoor gym padded with something softer than cement. Each 90min class begins with instruction into Parkour's philosophy of pragmatic usefulness, which emphasizes easing your way through obstacles (like having to sit through a discussion of philosophy). You'll then move on to stretching -- including oft-ignored body parts like wrists, calves, and shins -- followed by the essentials of landing/rolling/clutching your occipital protuberance and saying "ooooooh". Finally, you'll start leaping objects of increasing size, beginning with a pommel horse and presumably leading up to dumpsters filled with the guys who never made it past the pommel horse.
Class size is small, affording you the individual instruction you'll need to graduate into the unpadded world -- where you can vault straight into a tank of gun-toting 'gators.