Lesson: never ever ever wear CCW gear that I have not worn and practiced with for some time in private. I shudder to think what the scenario would have been in a crowded grocery aisle or such.
Excellent advice but IMhO you shouldn't beat yourself up too much about this. It would have been embarrassing to have it fall out in the grocery store but as long as you didn't grab for it and catch the trigger by mistake it wasn't going to go off.
I suppose there are a few folk that would have gotten an attack of the vapors at seeing an evil firearm in the hands of a private citizen in public and felt faint, but I think that's a good thing for them...toughen them up don't you know.