Meet the Flying Frenchies. This group is composed of five to six people who do base-jumping, mountaineering, climbing, alpinism, speed riding and pretty much all the sports that include flying, climbing and the mountains.
In this clip, these folks made the most awesome and terrifying things you will ever see. It is basically surfing and base jumping combined together. First they surf on a zipline and reaching speeds of up to 75kph zipline-style before using their base-jumping skills to dismount with impressive grace and style that will make your jaw drop. This is really pretty cool. Watch this clip.