Gravity Falls' Theories

Dreamscaperers

Trivia

In an earlier version, Bill made his appearance to Dipper in a dream.[7]
In Gideon's commercial, the Lil Gideon in Lil' Gideon's Tent o' Telepathy has an MT after it instead of TM, the symbol for "trademark."
Before going into the kitchen to fight the bat, Dipper picks up a saucepan and a spoon, both of which are nicknames of the constellation the Big Dipper.
The spell Gideon used to summon Bill is "Triangulum, entangulum. Veneforis dominus ventium. Veneforis venetisarium." Which roughly translated in Latin is "Triangle - I invoke you. I come to the defensive barrier of the mind. I will see the barrier destroyed."
Dipper chants the following to allow them to enter Stan's mind: Fidentus omnium. Magister mentium. Magnesium ad hominem. Magnum opus. Habeas corpus. Inceptus Nolanus overratus. Magister mentium. Magister mentium. Magister mentium. Taken together, the incantation is nonsensical. OR IS IT?
When Gideon falls to his knees and his eyes glow blue he shouts something intelligible. When played backwards you can hear he's actually saying, "Backwards message! Backwards message! Backwards message! Backwards message! Backwards message!"[8]
Stan's tattoo revealed.(burn scar)
While remembering Stan, Bill flashes an image that matches Stan's tattoo.
On Bill's page in Journal 3 the words "ATBASH," "CAESAR," and "A1Z26" are crossed off. These are the names of the ciphers used throughout the show.
Bill refers to Dipper, Mabel, and Soos as 'the pine tree', 'the shooting star', and 'the question mark', which are symbols surrounding his image on his page in Journal 2.
The number 618 appears multiple times throughout the episode.
In Stan's mindscape, the moon looks like his magic 8-ball cane.
Jersey Vultures logo behind Stan.
In the memory of Stan as a child and getting bullied in the playground, just before he is hit in the face with a soccer ball, a sports team name "Jersey Vultures" is seen behind him.
The first view of Stan's memories where it shows many memories at an angle, the scenes show his fez without the yellow symbol.
Two monster versions of Stan's head appear in his dreamscape. One is a bat-form, which has the current fez symbol. The other is a younger-looking version (no prominent ears) with crab legs, with no fez symbol.
As Bill leaves Gideon, he references the holographic principle, a hypothetical aspect of string theory suggesting that the known universe is a projection of events occurring on a multi-dimensional .