Wiktionary
vb. (present participle of powerbock English)
Wikipedia
The act of powerbocking is jumping and running with elastic-like spring-loaded stilts. For some it is an extreme sport, for others it is a form of exercise or even a means of artistic expression. The use of the stilts to perform extreme jumping, running and acrobatics is known as 'Bocking' or 'PowerBocking' after the inventor. Generically these are referred to as "power stilts", "jumping stilts", or "spring stilts". The stilts are often referred to generically as bocks or powerbocks, or by their brand name.
Each boot consists of a foot-plate with snowboard type bindings, rubber foot pad which is also commonly called a hoof, and a fibreglass leaf spring. Using only their weight, and few movements, the user is generally able to jump 3–5 ft (1–1.5 metres) off the ground and run up to 20 mph (32 km/h). They also give the ability to take up to 9-foot (2.7 metres) strides.
Jumping stilts were used in the closing ceremony of the 2008 Olympic games in Beijing.