Wheels of Doom and Leap KiteSkates by RockVille

www.doomwheels.com

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www.skaterace.com/Leap.htm

Skate Sailing

http://sites.google.com/site/wingskatesailpict/
http://home.swipnet.se/ansar/s.html

see also,
http://blog.modernmechanix.com/skim-over-the-ice-with-a-skaters-sail/#more
http://www.youtube.com/watch?v=4yVWg7-KFe0
http://www.youtube.com/watch?v=2emgfAowqDo

ZipBoard and Urban X

foot-steered
www.microuav.com/groundvehicles.html

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electric Urban X

Tandem luge

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Jet Powered Sled - Dirk Auer

www.dirkauer.com/

Downhill Inline Skating

Inline Downhill was in X-Games.

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63mph
www.streetski.com

Quads

(jump to 2:20)

MotoSk8

GrassSki

www.grasski.com
www.grasski.biz

GateSkate - TrailSkate

www.gateskate.com

Fun Slides Carpet Skate

Dirk Auer

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www.dirkauer.com

Crosskate

www.crosskate.com/

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Chinese gas version, Flash Skate
JETGO-2005SK FLASH SKATE

Booster Blades

www.booster-blades.com

Buggy Rollin' - Wheel Suite

from the movie, Yes Man

Jean Yves Blondeau
www.buggy-rollin.com
www.youtube.com/user/buggyrollin


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home made


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www.totallyabsurd.com/kneeskates.htm

Moto X Board

by Eric Briner

www.motoxboard.com/
www.silverfishlongboarding.com/forum/longboard-hybrids/108386-motorized-mountainboard-works.html