Just had my first failure-to-unclip fall this morning. Couldn't find the wrench to loosen up the tension on my pedals, but did ok yesterday so I decided to just go out and ride again and adjust the pedals later. Today my goal was a substantial hill, to see how much easier it would be on the Bike Friday, seeing as the gears are (effectively, what with the small wheels) SOOOOO much lower. But the gearing is also a bit twitchy. Got to that hill, tried downshifting, chain fell off, and couldn't unclip fast enough. I think my unclipping-side ankle is sprained. Also some road rash on that knee and a bruise with a bit of a cut on the opposite shin. But no witnesses . So I just sat there in the road intertwined with my bike for a few seconds, then unclipped, got up, got the chain back on, and headed back home. Found out next stop that I'd have to switch unclipping sides for now due to the sprain, but managed that. Now I'd better get showered and dressed. Long pants today to hide the bruise so I don't freak out my Mom. (Trek, if you see this ... shhhhh!)