YouTube - LOL - Motorbike Which Runs On Air

Engineering students in India have developed a pollution-free motorbike, called the air bike which runs by using air pressure.
Equipped with two compressed air cylinders, the 100cc bike currently runs at a speed of 18km per hour, but the students hope to make it faster.

http://news.bbc.co.uk/1/hi/world/south_asia/8028309.stm