A different kind of mind-warp
We had the "2001" soundtrack on vinyl 12". On Side 1, Also Sprach Z and another lovely classical piece were bookends around some of the choral parts. Those were supposed to be eerie and unsettling, so they aren't exactly cheerful sing-alongs.
Well! One day I fell asleep listening to Side 1 with headphones pouring that creepy wailing straight into my brain. I woke with a vague memory of incredibly weird dreams, and a feeling that the universe was creeping up on me with something very sharp. Hell probably licenses those choral tracks for the reception area.