Back in the era of gas rationing in Europe after the Suez crisis (mid-1950s), there were all kinds of weird cars launched on the market. My ride to work was a three-wheel "bubble" car made by Heinkel. The engine (175 ccs) and transmission were in the rear and drove the rear wheel, so it was a "pusher". It was a side-by-side 2-place "car" and the entire front opened, taking the steering wheel along to allow driver and passenger entrance/exit.
With rationed fuel and short supplies, 125 mpg was pretty good and you weren't out in the weather like on a motorcycle. It didn't win any "Stop-light Grand Prix", though.
