Two incidents that I can remember. First time I used clippless pedals outdoors. (everyone remember's their "first time"). I've been practicing clipping in and out more than a dozen time on the trainer at home and short ride around my block.

First time going out on a group ride, day after getting the new pedals. I chanted to myself, CLIP OUT, CLIP OUT...100 yards from start line, I just stopped, and just stalled and didn't clip out and fell right on my hips. A few people quipped, "New pedals?". Embarrassing.

Second time - There was a bike trail that adruptly ended before the street, so there was a small ditch of gravel. I saw it, and I was just saying to myself, "you won't fall, just ride through it, and you'll be fine." Felt like my life flashed before my eyes. I remember thinking, "Who is the idiot that made the trail?! And I remember thinking, "land on your left!!" Believe me, it took some wobbling and TIME and I fell to the right side. My right foot got unclipped and wedged itself between the chains, causing me to get tangled up. How? I have no idea!! Suffered palm bruising, ego bruising (I should have just gotten off and walked over it), scrapes on my knee, and the pedals got VERY tight (it was easily fixed).