None of the poll replies fits me. I fell once, but not when I was learning to use them. I was just distracted when pulling into my driveway, didn't turn to the right fast enough, ended up in the grass and, when I knew I was about to go over, started getting the right foot unclipped, because that's what I'm used to unclipping when I stop .... however I was falling to the LEFT, so I over I went!

My dh has fallen at a red light from not unclipping in time.