Well, then you get something like the Twike (it's actually called the Twike 3, but we'll stick with Twike for simplicity), which is neither a bike nor ... its single front wheel that's controlled ...

We found that a majority of the seniors whom we surveyed and who test-rode three bikes preferred a three-wheeled adult ...

The person was reportedly riding a three-wheeled bicycle. Anyone with information that may help identify this individual is ...