Trying to figure out how much fun this electric bike could be 
View: http://www.youtube.com/v/ahr9sUnqfeM&hl=en&fs=1
http://www.erockit.net/en/

View: http://www.youtube.com/v/ahr9sUnqfeM&hl=en&fs=1
http://www.erockit.net/en/
The World’s First Man-Machine Hybrid Motorcycle
The electrically driven eROCKIT is best described as the alignment of two extremely different characteristics. Conventional handling that is familiar to everyone, coupled with a highly innovative and revolutionary propulsion system.
Everything about eROCKIT’s general handling comes from the common bicycle. From using the pedals to accelerate and ride the vehicle, to the rear and front wheel brakes, whose handles are positioned in natural locations on the left and right handlebars.
The revolutionary propulsion system is based on muscle force multiplication and delivers comparable power to a regular motorcycle. This is possible due to the proprietary eROCKIT electronics monitoring the driver's muscular effort and multiplying it by a factor of up to 50. The multiplied force is then transmitted to the rear wheel propelling the eROCKIT to a top speed of up to 80 kph (50 mph).
A paradigm shift in motorcycle construction
The eROCKIT bridges the gap between the regular two wheeler categories. On one side the muscle-powered two wheelers, on the other side, the motorcycles. The eROCKIT concept requires a continuous muscle deployment from the rider. The vehicle's electronic system multiplies this muscle power and deploys it as vehicle propulsion.
For the first time in the history of vehicle construction, the driver's physical power becomes just as relevant for driving dynamics and speed as technical vehicle properties and engine power.