Comment by lelanthran

> but there is something about the geometry of a bike that is sort of self correcting.

Yup. Plenty of videos on youtube where they send a bike down a hill with no rider and as long as there is forward motion it will self-correct and stay upright.

Bikes in motion are self-balancing, and with no rider on, will continue indefinitely until the forward momentum has been exhausted.

https://www.youtube.com/watch?v=NcZCzr9ExKk