Gravity Falls is a Disney animated series created by Alex Hirsch that ran from 2012 to 2016, following twins Dipper and Mabel in a strange Oregon town. Weirdmageddon was its climactic final arc in the second season, in which the dream demon Bill Cipher unleashes chaos on the town and reality itself. The opening sequence was reworked to match that takeover, giving the familiar theme a darker, more distorted feel. Fans have since shared this version online for edits, memes, and Halloween-style videos, keeping it popular long after the finale.