Glad you were okay. I had my share of clipless pedal falls when I first started but have not fallen since the first 2 months.
Your post reminded me that I dreamed about falling over this morning- riding through a group of people who were standing around and taking pictures of each other for some kind of event (graduation or wedding). They were in the way and I slowed down to avoid hitting them, and just couldn't get my foot free. At least in the dream the fall was kind of slow motion, and I fell down gently and neither of us (bike or me) was hurt.
2016 Specialized Ruby Comp disc - Ruby Expert ti 155
2010 Surly Long Haul Trucker - Jett 143