On the physics of riderless bicycles.

[sara]

And in case the embed doesn't come through properly, because they don't always: Science Friday with Ira Flatow, on the physics of riderless bicycles and their tendency to self-right.

My theory is that it doesn't fall over because it's a Bianchi, and therefore reasonably well-designed, but this may just be my experiences with Tippy the Wonder Bike talking (Tippy was a really substandard Specialized that threw me more often than any bike I've ever been up on, including the little red Schwinn I learned to ride two-wheeled without training wheels. Tippy has since been broken down for parts, which is no less than she deserved. Tippy convinced me that some frames are just evil much less well-balanced than others, in ways which will not be evident to the rider until she has no skin left on her damn knees.)