Originally Posted by
jefferee
I just went clipless (SPD) this past Wednesday.
So far, I haven't gone all the way to the ground... the bike has gone toward my clipped-in foot on two or three occasions. However, I have the retention screws set as loose as possible so that (at least so far) any quick attempts to put a foot down result in sufficiently quick unclipping to avoid a fall.
So far I've never had my shoes come off the pedals unless I wanted them to. Are there any good reasons for me to ever consider tightening up those retention screws?
...aaaannnnd.....
So much for the streak...

I was riding along a MUP, came up to a bad-visibility street crossing, and unclipped my left foot (SOP). Just as I was about to roll through I noticed an oncoming car and (prudently, I thought at the time) thought it would be best to wait even though I could have made it if I put the hammer down. So I hit the brakes, stopped, and as the bike began to tip over to the left I realized that my left foot had clipped back into the pedal. Tried to hang on to the bars to avoid jamming my wrist in an attempt to break my fall and was mostly successful. Slight scrape to the knee, no damage to the bike, and most importantly, no nearby witnesses other than possibly the driver of the car.
I have to say that it really wasn't much of an event--not having particularly brittle bones I think I can easily take a few more of those sorts of falls (but hopefully won't).