^^^^no leaving halters on here, either. I learned that from my granddad many years ago.
His horses were on 50 acres and his theory was "if you can't catch the horse without a halter, maybe you need to forget about riding today and do something else --- there's plenty of work that needs done around here"
Regarding horses not leaving a burning barn unless they are blind-folded; I have also heard that. I have no idea if there's truth to it and hope I never find out.
My barn is only 24, x 40, so only has a narrow escape aisle; barely room for them to turn around.
My horse have always been good about understanding my sense of urgency for something. I can only hope if I were in this situation, they would listen to my loud voice and flailing arms when I say "move em out - NOW!". "move em out" is what they all know and comprehend when it's time for turnout.
Once they would get thru the paddock gate into the pasture, hopefully Mr. WTW would have the presence of mind to re-close the paddock gate so they couldn't get near the barn.