A comparable behavior in a car would be to ride your clutch while the light's red and roll up and back a little bit. It freaks people out because they don't know if the driver is really going to take off or not. The same thing happens when you track stand.

I tried the trackstand thing yesterday. I came to almost a full stop and rolled out just a little. There was a car trying to make a left turn into where I was coming out of, and I intended to go straight. I rolled a little bit as if I were going to make a right hand turn to give the guy room, but he didn't know what I was going to do so he waited, which was exactly what I didn't want. Well, you all know that situation. I thought of my earlier post in the thread when that happened and at the next intersection I just put my foot down and waited.