Base Jumping

BASE jumping is a sport involving the use of a parachute to jump from fixed objects. "BASE" is an acronym that stands for the four categories of fixed objects from which one can jump:

* Building
* Antenna (an uninhabited tower such as an aerial mast)
* Span (a bridge, arch or dome)
* Earth (a cliff or other natural formation)

The acronym "BASE" was coined by film-maker Carl Boenish, who in 1978 filmed the first jumps from El Capitan to be made using ram-air parachutes and the freefall tracking technique, which effectively defined modern BASE jumping. BASE jumping is significantly more dangerous than similar sports such as skydiving from aircraft, and is currently regarded as a fringe extreme sport.