As a young broadcast engineer, unschooled in IT at the time
I managed to mistake two commands on a newsroom scripting system (early eighties - probably Basys running on mini-Vaxes). This provided access to stories for editing and printing, and also delivered them to the autocue systems and provided printouts of running orders, times, and the like.
One command restarted an individual users' session in case they locked out their dumb terminals, the other restarted the whole system.
Guess which one I chose at three minutes to six? Guess what took a good two minutes to start to come on line again? Guess who had an interesting conversation with the station manager after the show?