I've suddenly remembered an incident from the mid sixties which was a 24 carat "Oh Bugger" moment. It waas during a steam railtour headed by I think "Sir Nigel Gresley" (long time ago now).

We all got out of the train to watch the loco being uncoupled from the train before another loco took over. A chap got between the tender and the first coach, took off the coupling, brake hose etc, came out from under and waved to the driver.

The driver moved forward and there was a loud RRRRRIIPPPPP followed by shouts of "WHOA!!!" The chaps had forgotten that an A4 has a corridor tender and nobody had separated the connection to the first coach. We stood around for about an hour while mutual recriminations proceeded.

The strange thing is that nobody took a photo, laughed or otherwise misbehaved. I think everybody was worried that we wouldn't get home until the next day!