![Atop Empire State- in construction; Chrysler Bldg & [Daily] News in middle foreground. (1931)](../../../wp-content/uploads/2011/05/Atop-Empire-State-in-construction-Chrysler-Bldg-Daily-News-in-middle-foreground.-1931--199x123.jpg "Balancing on the Empire State, 1920s")
‘The Ford Gyron was a two-wheeled gyrocar first shown in 1961 as a concept car. One wheel was at the front and the other at the rear like a motorcycle and the car was stabilized by gyroscopes. When the vehicle was stationary, two small legs appeared from the sides to support it.’
- Wikipedia
They should build it now!
Interestingly 40 years later we have MonoTracer, history repeats itself.