I was on volunteer patrol at Stevens Pass in the 70s. It was sweep time, night skiing, after 10:00 pm. My group was sweeping an intermediate lift (Brooks). We were about 1/4 of the way down when we came across a single skier who had been abandoned by his "friends" who took him to the top of the lift for his first time at the end of the night. It was his first time skiing and his equipment was not adjusted correctly so that he kept blowing out of his bindings. He was going nowhere fast.
Some of the more senior patrollers tried to help him navigate, but he had lost his cool and was in no mood to learn to ski at that time. The SOP for this situation was to put him in a sled and get him off of the hill, but the nearest toboggan was about 1/4 mile away uphill, the chair was shut down, it was cold, it was dark, it was foggy, and we were thirsty. One of those senior guys (a pro patroller, I think it was the then patrol director) decided to load the guy on his back and ski him down. My buddy and I were given his skis and poles and told to carry them down. So, off we go...
Meanwhile, one of the sweep crew from another lift finished their business and skied by the bottom of their lift, which had the light controls. He waved a friendly wave to his buddy, the lifty, who mistook the wave and shut down the lights for the entire hill. After all, he'd been waiting in the cold and it was about the right time. However, our entire sweep team was still on the hill, at night, with clouds and fog so no moon or starlight. It was BLACK and they couldn't turn the lights back on for about 20 minutes for some technical reason.
The two of us (my buddy and I) were assigned a back trail that was not lighted, but got enough bleed-through illumination that it was sometimes used at night. When the lights went off we couldn't see anything at all. We were in the middle of a trail cut from dense forest; one that was not groomed and was full of bumps. Needless to say, we stopped. After a while we were able to discern the slightly darker trees at the side of the trail, so with judicious snow plowing and very careful progress we got ourselves out of there. It was not fun and we extensively used our nautical vocabulary to indicate our emotional state.
Meanwhile, when somebody figured out that one entire lift's worth of sweepers was unaccounted for, people freaked and an army of snow vehicles swarmed the hill looking for us. Apparently the guy who was riding on the director's shoulders was pitched off when the lights went out and needed a different type of rescue, but, fortunately, he was not injured.
The director lost his job not long after this incident, but I was just a lackey and never found out if it was a contributing factor. I suspect that it was.