I'm saddened to learn of your accident. I'm new to clipless pedals as well, I just got a pair of Shimano 105's last Thursday and only bought them because many reviews said they were easy to get out of. I've been practicing on grass and taking very short rides of only a few blocks. I've come close to falling twice but was able to get out of the pedals in time. The binding is on the lightest tension setting. I fear that at some point I'm going to fall as well, I just hope I don't damage the bike in the process. Skin will heal, this man-made stuff won't.

I hope you'll soon be feeling better.