Suspended Catch Air Device (SCAD)
Seen at theme parks around the world, the SCAD is little more a giant net at the bottom of a high structure where participants are strapped into a harness and then dropped like bombs onto a swath of land. This type of ride is said to elicit such a high level of fear that scientists have used it to study the nature of fear in human beings.
As you might have guessed, many accidents and fatalities have been connected to SCADs due to the nature of their design: one twelve year old girl was dropped at a SCAD located in the US and missed the net, resulting in spinal and skull fractures.

Source: Kirms Und Parks