as you stand in the doorway of the plane,you feel nervous but excited.you are more than 4000 metres above the groud.The parachute on your back is heavy,and the noise of the plane is very loud.Then you jump.five seconds later you feel like you flying.You are falling at nearly 200 kilometres acn hour,but you are in control.you can chenhe you direction and speed just by moving your body .For around sixty seconds it's iust you and the skt