When I first started using them I was conscientious of their existence, and always unclipped. It helped that I was riding on a bike path and didn't need to clip in and out several times. Then when I got moderately comfortable, doing a slow roll to meet the group under the office's front door canopy, I forgot to unclip, and fell over. Smashed my face on the concrete steps and broke my nose. Didn't go riding that day.