To put it simply, this song's about a bad shroom trip. Psilocybin is the active chemical in psychedelic mushrooms.
It sounds like the narrator had a traumatizing trip when he was seventeen, in which he hallucinated the "Jack-o-lantern man." What this man represents isn't clear, but the hatred the narrator feels for him, perhaps because of how the trip affected the narrator, is definitely clear.
To put it simply, this song's about a bad shroom trip. Psilocybin is the active chemical in psychedelic mushrooms. It sounds like the narrator had a traumatizing trip when he was seventeen, in which he hallucinated the "Jack-o-lantern man." What this man represents isn't clear, but the hatred the narrator feels for him, perhaps because of how the trip affected the narrator, is definitely clear.