Perhaps you meant to unclip and it didn't unclip? then, you can fall easily. If that is the case, maybe your cleat tension is set too tight. A mechanical problem, not yours.

Someone else mentioned it too, maybe you can set the tension at the lightest setting. I have mine set to very light, yet, if your pedaling properly and the feet doesn't twist side to side, it won't become unclipped by itself.

knotty