Ford - Self-propelled unicycle engagable with vehicle (patent)
Will the next Ford Focus Electric get an electric unicycle option? No...but check this out.
In December, Ford Global Technologies published this patent - "Self-propelled unicycle engagable with vehicle" (Patent Number: US 9,211,932).
The idea is to have a wheel with own electric motor and battery, that could be disengaged from the car for last couple miles of a journey. We could name it a bike-extender.
A cool side effect of the system is its anti-thief capability, because it will be not easy to escape with a car on three wheels.
Patent was found and described in video by PatentYogi (see below):