Well let's see. Hmmm. I can't recall ever falling.
Uh oh. Looks like I got caught.
Actually I did ok when I first started using clipless. It was after using them for several months that I started getting cocky and fell.
Twice while riding too slowly.
At least once while showing off.
Too many times when approaching a stop sign or light and didn't or couldn't get unclipped in time.
Once when riding too close to the curb and my right pedal hit the curb and down I went.
Once while showing another cyclist the "correct way" to unclip.
I'm sure there were other times but my subconscious is starting to block unpleasant thoughts and images.