This is a real scenario experienced by my brother in Houston who was not armed.
While in the restroom (at urinal) of a fastfood restaurant, someone came in behind him, claimed to have a gun, (don't think he actually saw it) and demanded my brother's leather jacket. My brother gave it to him and the BG left. He stayed in the restroom for a few moments and did not see if the BG acted alone.
As a martial arts instructor prior to my CHL, I have always figured on following my own teaching of "Give them the jacket, wallet, etc, if you can get out alive." I am not for taking a life over anything I can replace. But.....
Not only is it difficult to determine whether I will be harmed anyway, but what if my weapon is exposed while removing the jacket?
What if I am wearing a CC jacket with my weapon in it?
Remember, he is behind me telling me he is armed. I am all about awareness, but even I am a little preoccupied at that moment.

Just wanted to see if anyone had thought about this.