Sometime our surroundings don't exactly cooperate with us>

It's good to see that your training has become an automatic response. That should be the goal of any martial artist. Way to go!
On a personal and some what humbling note, A few years ago I was over at a friends house playing cards with another couple and my wife. We were sitting in those cheap outdoor plastic chairs and I leaned back to throw a bottle away and the back legs on the chair forded in. The next thing I know, I'm laying on my back looking up at the table, my chin tucked and both of my arms out at my side, having done a rear breakfall without even thinking about it. My chin was even tucked into my chest. Everyone at the table was standing up and asking if I was allright. I got up and felt fine, but all the kids that were playing in the livingroom had a clear shot and were laughing hysterically, even my 2 kids.
Mahalo, Jeremy