Quote Originally Posted by thinpaperwings
I love the site. However, I notice that the "sharp" cyclist tended to have jerky movements. A great example of this is in the Left Turn in Heavy Traffic clip. I think if I were driving my car behind him I would be worried about what he was going to do. I guess I just expect people to execute smoother movements.
I thought the movements looked jerky, too. But their theory is that this makes you look more decisive to the driver, and also more noticeable. You just said it yourself that if you were in the car you'd be worried about what he was going to do. I.e. you'd be paying more attention. If you always act in a way that is more predictible and expected, you're easier to ignore.