HALFPIPE
Half-pipe
A half-pipe is a structure used in gravity extreme sports such as snowboarding, skateboarding, skiing, freestyle BMX, and inline skating. The structure is wood, concrete, metal, earth, or snow. It resembles a cross section of a swimming pool, essentially two concave ramps, topped by copings and decks, facing each other across a flat transition. Originally half-pipes were half sections of a large diameter pipe. Since the 1980s, half-pipes contain an extended flat bottom between the quarter-pipes; the original style half-pipes are no longer built. Flat ground provides time to regain balance after landing and more time to prepare for the next trick.The above text is a snippet from Wikipedia: Half-pipe
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halfpipe
Noun
The above text is a snippet from Wiktionary: halfpipe
and as such is available under the Creative Commons Attribution/Share-Alike License.