It's not "mental apocalypse," it's "dancehall apocalypse." Josh once explained in an interview that the dancehall apocalypse metaphor is about horrible things happening during times you expect things to be good. Dancehalls, he said, were supposed to be places full of joy and fun, and apocalypse, obviously, is the complete opposite. Anyway, that phrase sort of fits the song; it's kind of melancholy/bitter sex.
It's not "mental apocalypse," it's "dancehall apocalypse." Josh once explained in an interview that the dancehall apocalypse metaphor is about horrible things happening during times you expect things to be good. Dancehalls, he said, were supposed to be places full of joy and fun, and apocalypse, obviously, is the complete opposite. Anyway, that phrase sort of fits the song; it's kind of melancholy/bitter sex.