Amazing pictures from Switzerland show where "jetman" Yves Rossy gave this incredible flying display, using a tailor-made jet pack. The aviation enthusiast leapt from a helicopter and performed a series of aerial acrobatics above the Alps. He then joined two jet planes in a synchronized flight. To synchronise their flight paths the jets reduced their speed to 220 kilometres per hour (137 miles per hour), which put their engines at a point close to stalling. Rossy's previous aerial feats include flying the English Channel and looping the loop around a hot-air balloon.