The severity of a fall depends on your speed when you strike the ground

The speed at which you fall does play a role in the severity, but it also depends on the way that you hit the ground. Falling flat on your face or chest at high speeds will most likely lead to death. However, if you fall looking up towards the sky and don't hit your head, you have a greater chance of only walking away with injuries. It is possible to be killed from a fall of a minuscule distance if impact is made and causes brain damage or an artery to burst. There is less than a 1% chance that someone will survive if this is the case.