I think you might be missing the point I was trying to make. Yes, I've recently fallen while trackstanding clipped in. However, there have been hundreds of other trackstands, some very long, where I have not fallen. I know how to trackstand and I'm confident in doing so.

My question was about the physics and biomechanics involved, and how a person can trackstand more safely and confidently by being able to understand and anticipate what their bike is going to do when things go wrong or are about to go wrong. For example, yesterday I was at a light, ahead of the cars lined up to go straight. A large truck decided he was going move alongside me in order to turn right. There wasn't much room, so I had to roll backwards a foot or two to reduce the risk of him bumping my front wheel.

The pucker factor increased dramatically as I rolled back because I was on an incline and I almost rolled too far. Would it have been better quickly turn my wheel left and roll out of the trackstand and put my foot down?

What I'm trying to gather are experiences of those who have fallen down after they had learned to trackstand in order to see if there are some consitancies as to what happened and what people were trying to do when they fell.