I worked in radio for awhile, and at night we had a procedure where the board operator (the only person in the building over night) checks the transmitters periodically to make sure they're operating within certain specs. After dark, you also have to check a little indicator for the lights on the tower.

One night the indicator said the lights weren't on. I called the chief engineer and woke him up. He advised me on power cycling the whole thing, and said "if the lights don't come back on, you're going to be spending some time on the phone with the FAA." Luckily, they did. Learned something about my job that night, though.