I seem to remember that the first F4M's we received at Coningsby had hydraulic wingfold whilst later ones had purely mechanical (literally manual). Folding the outer wing involved (obviously) pushing up from underneath until a couple of guys on top could grab hold. The more vertical the wing became, the less mechanical-advantage the guys underneath had, whilst those on top were limited in what they could grab as their toes were hard up against the hinge and increasingly vertical outer.
Just before lunch one Friday, I was working away under one aircraft when, from across the other side of the hangar there was a loud yell, an equally loud thump, followed by a brief but deadly hush. The (almost) inevitable had happened and a young fresh from training school J/T had not realised the implications of the yell from on-top and failed to dive out of the way. The poor chap was spread-eagled on the concrete, unconscious. It took SSQ an absolute age to send an ambulance, by which time the J/T was begining to show some slight signs of life. We all assumed he would be whisked to Nocton Hall to have his bonce X-rayed etc and were amazed when SSQ sent him to his billet after giving him a cuppa and a couple of aspirin.
XV431 - was that the one that tangled with an over-exuberant Harrier in Germany (or was it the other way round?).