Glad to hear your first clipless fall was a "safe" one. I started riding last year and practiced clipping in and out on my bike, supported by the walls of
my apartment's narrow entry hallway--my roommate thought I was a freak! My first fall was also at the dreaded intersection. Thankfully it was 6am and few cars. I blame it on still waking up! Congrats on getting the clipless pedals--you'll notice a big difference. Have fun!
-S