i got my first clipless pedals on monday. id never used this style of pedal before. i was riding and talking to someone trying to figure out where we were and i decided to stop so i could use the gps on my phone. i pulled up to a curb and stopped and leaned over to put my foot down but i'd only been riding 15 mins and i forgot my feet were clipped in so i just fell over. the fall wasnt bad at all but my thumb went right into a sewer grate. i ended up breaking my thumb and cutting the tip clean off. ouch.
i've continued riding with them since and i totally love them now that i am used to them.