when very young i temped for a while, and got a telephonist job in a bank, these old plug boards, on being shown the weeny cupboard i was to work in with the switchboard what the duties were, i was left too it. Someone turned the lights out so i was sitting in the dark, after a hasty helllooo, the assistant apologised and explained the permanent telephonist was blind so didn't need the lights on,
The claustrophobia kicked in after ten minutes, i lasted one day.