Sorry to hear about your fall CR - but welcome to the club. As for your clips having other ideas: if it helps any, next time rest your heel on the pedal, that way the foot can't clip back in.
as for are they worth it MH? Heckie yeah! Take your bike to a grassy area and first and just practice clipping in and out. Also, in the early stages of riding, unclip just as soon as you even THink you're going to stop, like unclip and then reach for the brake, that way you won't have that moment of panic about your feet. And don't worry it, we've all fallen, we've all been there!
TLK: ROFL on the attempting to track stand without knowing how to track stand! On Yeah - played That game before! and one of these days I Won't get unclipped in time!
CorsairMac: yup, I fell in the median, during rush hour traffic, coz I just couldn't bear the thought of falling all alone!!
Life should NOT be a journey to the grave with the intention of arriving safely in an attractive and well preserved body, but rather to skid in sideways, champagne in one hand, strawberries in the other, body thoroughly used up, totally worn out and screaming: "Yeah Baby! What a Ride!"