That's what I want, a pedal that only releases me when it's in the mood...

I guess that's just one more reason to love Speedplays, even if you do have to turn your foot like 180 deg to get out on a normal day. (Okay, maybe not quite that much.) I can't picture a failure that would lock you in to them.

I've been using SPDs on my Mtn. bikes for years, and have never had or considered this mode of failure. Doesn't sound like much fun. I guess failure mode is something to consider when buying pedals.