The question is causation. The only time I've fallen that I could partially attribute to being connected to the pedals, was when I tried to turn around on my road bike on a narrow gravel road. I turned too sharply and went down quickly. Was this 'because' of the shoe/pedal attachment or because of my miscalculation? I blame the latter, 'tho maybe I would have gotten my foot to the ground in time had I been riding with plain old flat pedals, no clips no 'clipless.'