bungee jumping

Bungee jumping (also spelled "Bungy" jumping)is an activity that involves jumping from a tall structure while connected to a large elastic cord. The tall structure is usually a fixed object, such as a building, bridge or crane; but it is also possible to jump from a movable object, such as a hot-air-balloon or helicopter, that has the ability to hover over one spot on the ground. The thrill comes as much from the free-falling as from the rebounds.

When the person jumps, the cord stretches and the jumper flies upwards again as the cord snaps back, and continues to oscillate up and down until all the energy is dissipated.
Equipment :
The elastic rope first used in bungee jumping, and still used by many commercial operators, is factory-produced braided shock cord. This consists of many latex strands enclosed in a tough outer cover. The outer cover may be applied when the latex is pre-stressed, so that the cord's resistance to extension is already significant at the cord's natural length. This gives a harder, sharper bounce. The braided cover also provides significant durability benefits. Other operators, including A J Hackett and most southern-hemisphere operators, use unbraided cords in which the latex strands are exposed (pictured at right). These give a softer, longer bounce and can be home-produced.


Although there is a certain elegance in using only a simple ankle attachment, accidents in which participants became detached led many commercial operators to use a body harness, if only as a backup for an ankle attachment. Body harnesses are generally derived from climbing equipment rather than parachute equipment.

Retrieval methods vary according to the site used. Mobile cranes provide the greatest recovery speed and flexibility, the jumper being lowered rapidly to ground level and detached. Many other mechanisms have been devised according to the nature of the jump platform and the need for a rapid turn-around.

The Highest Jump :
In August 2005, AJ Hackett added a SkyJump to the Macau Tower, making it the world's highest jump at 233 metres (760 ft).
The SkyJump did not qualify as the world's highest bungee as it is not strictly speaking a bungee jump, but instead what is referred to as a 'Decelerator-Descent' jump, using a steel cable and decelerator system, rather than an elastic rope. On 17 December 2006, The Macau Tower started operating a proper bungee jump, which became the "Highest Commercial Bungee Jump In The World" according to the Guinness Book of Records. The Macau Tower Bungy does have a "Guide cable" system which limits swing (the jump is very close to the structure of the tower itself) but does not have any effect on the speed of descent, so this still qualifies the jump for the World Record.

There is another commercial bungee jump currently in operation which is just 13m smaller, at 220 metres (720 ft). This jump, which is made without guide ropes, is located near Locarno, Switzerland and takes place from the top of the Verzasca Dam (pictured). This jump was prominently featured in the opening scene of the James Bond film GoldenEye.

Safety and possible injury :
There is a wide spectrum of possible injuries during a jump. One can be injured during a jump if the safety harness fails, the cord elasticity is miscalculated, or the cord is not properly connected to the jump platform. In most cases this is a result of human error in the form of mishandled harness preparation. Another major injury is if the jumper experiences cord entanglement with their own body. Other injuries include eye trauma, rope burn, uterine prolapse, dislocations, bruises, whiplash, pinched fingers and back injury.
Age, equipment, experience, location and weight are some of the factors, and nervousness can exacerbate eye traumas In 1997, Laura Patterson, one of a 16-member professional bungee jumping team, died of massive cranial trauma when she jumped from the top level of the Louisiana Superdome with improperly handled bungee cords and collided head-first into the concrete-based playing field. She was practicing for an exhibition intended to be performed during the halftime show of Super Bowl XXXI. The bungee jumping portion of the show was removed from the program and a commemoration of Patterson was added.