Many years ago
in the days of analogue telly, we were covering a football match for MOTD as we did most weekends. At the time I was a vision engineer and during the match our main function was exposure and colour matching of the cameras. The cameras themselves were Philips LDK5s, which had a Camera Control Unit and power supply unit in the truck. The PSU was basically a big FO transformer (and some electronics in a separate narrow unit) and two fitted side by side in a ninteen inch rack. They had one control on the front panel, an illuminated push on push off switch which required a decent bit of force to operate. They were mounted just above floor level.
Being Philips, there was a guard around the switch to prevent accidental operation. Being Philips they often bent or fell off. The engineer sitting next to me, let's call him Billy, was bored with the game and had a mid-half stretch which included his legs. We all heard an ominous 'click' as his size nine planted firmly on the guardless switch, and laughed as we knew what was coming next. The switches didn't change state until released, so Billy had to spend the remaining twenty minutes of the first half keeping the switch pressed in and therefore the camera operational.
How we laughed.