These futuristic Acton R10 roller skates strap on to your regular footwear via strap bindings. Similar to snowboard bindings. They can support riders up to 250 lbs and have a two wheels and a 55-wattt motor per foot. The Acton R10 RocketSkates ($699) can move riders at speeds of up to 12 mph and controlling them is as easy as leaning forward to accelerate and backwards to decelerate. Video after the break.