I fall about once a year, but never because I forget to unclip.

Last one came when I almost right-hooked a jogger. Teenaged girl, running on the sidewalk of a rural road. Wearing ear buds. Just ran off the sidewalk into an intersection without looking for turning traffic. I stopped fine. Unclipped right. Told her that she should look, because next time it might be a truck turning instead of a bike. What I didn't realize---my rear wheel was on sand. When I tried to take off again, my rear wheel slid. Of course, it slid to the right, with the bike tipping towards the clipped in foot.