In fact, it is so dangerous that it is outlawed in some places. BASE jumping is called the most dangerous sport on Earth. There would be very little time to use a parachute to slow your fall before you hit the ground. \): Base Jumpĭoes just looking at this photo cause you to break out in a cold sweat and experience heart palpitations? Imagine how scary it would be to fling yourself backward off a tall building like the BASE jumper in the photo.