German Gothic Gore...you are right....
HALLOWEEN! :)
(HUGS)
I ran out of ideas until you mentioned Halloween. Now I have some stuff to post.
Long before "Sergeant Pepper", Hector Berlioz set a drug trip to music. Here the drug is opium, not acid.
Berlioz: Fantastic Symphony (The March to the Scaffold)
In which our anonymous hero dreams he has killed his girlfriend and is marched to the gallows.
Our anonymous hero takes his final drop -- and wakes up at a witches' sabbath, and who does he see but the girlfriend he just offed. Berlioz jazzes up the Dies irae.