Engine. Gear driven cams.
Giving more stability and maneuverability to the vehicle at top speeds too, this innovative Spherical Drive System is applicable to fully operational electric two wheeled vehicle.
Four-Wheel Bike for Sale | Extreme! 4-Wheel Pedal Bike | Gear Review | Gear Junkie
Four wheel downhill bike. How cool is that!?
Athos extreme quad-cycle
Steadicam for iPhone. Awesome. ~i#gadgets #technology #electronics Gadgets - The Very Latest Gadgets
SWISS ARMY’S TIMELESS PISTOLS SiG P210
This robot design is.... great.