Nightmare in Red is such a bizarre episode.

Everything about that episode was so strange and bizarre.

Easily one of the weirdest I've seen of a cartoon. Especially when the gang gets transported to the Twin Peaks red room and they see all the good "parts" of people frozen. And then there was that monster chasing the gang and trying to kill them. The episode is like something straight out of a lucid dream. I mean, even Velma was basically like - "What the fuck is going on? Science usually explains things, but this makes no sense!"