I too have had the clipless stumbles, I call them stumbles cause I never really fell, I did ride with some people once that I had never ridden with and one girl was very nervous riding in the road. we had to stop wait for traffic to stopp so we could cross a road and when it was clear we were all bunched up crossing and she just stopped I was in back of her, caught her back wheel and we went down kind of slipping sideways down the little incline. We were ok, her bike ok, my shifter hit the ground...not ok had to replace it.
