About 30 years ago I went night skiing at Wisp Md. At the time they only had lights on 2 runs. One was
a very very easy green, and the other was their hardest "double black" run than no one was skiing.
So I follow everyone down an intermediate slope that was pitch black with no lights at all.
You could see absolutely nothing. People skiing all around you. If someone fell everyone would ski over them.
The weirdest most dangerous run ever!!