As a child back in the 70s I was reading a local newspaper somewhere in East London. I had relatives there and with no day time TV or iPad in those days, I read whatever I came across, as we were expected to be seen and not heard etc.
This would have been 74/75 and in this rag, there was a story about a chap attending a West Ham match and afterwards he nudged someone accidentally in a pub.
The person he nudged, then stabbed this chap in the back.
( a rare event back then)
Apparently the usual, 'sorry mate' and 'that's not good enough' , scenario.
Anyway, the article went on to say that the person stabbed wasn't that badly injured, as he had been wearing his brother's RAF great coat, the brother being home on leave.
It stuck in my mind that an RAF great coat must indeed be made of strong stuff.
I was somewhat disappointed a few years later to be only issued with a service raincoat as I was kitted out for UAS flying.