-Dipper and Mabel begin to keep a book of their own, recording the anomalies they find in California.

-It’s not a journal, however. It’s a Diary/Informational Textbook. (Accounts differ on its name.)

-That haunted house down the street? Crawling with ghosts. They’re friendly, more or less, so they don’t bother exorcising them. All they want is some company.

-No one is Piedmont expected the twins to come back with a lying habit and gambling know-how, but they do.

-Likewise, no one expects Mabel to con kids out of their lunch money with a game of cards, but she does. Daily. Fresh competition comes every day to try and beat her, but she reigns undefeated. The money is saved for bus fare.

-Their parents forbid Waddles, at first, then finally give in when they discover they’ve been keeping him at the haunted house.

-Teachers laugh when Dipper and Mabel tell them they’re going to become scientist and assistant, but they’re dead serious.

-Mabel plans on bedazzling the heck out of their lab.

-Dipper writes the entries; Mabel edits and adds illustrations. They’re both happy with this compromise.

-Mr. and Mrs. Pines can hear their children when they have nightmares, but no one ever brings it up, and it’s an awkward topic between them.

-Sometimes they say they’re going on sleepovers, when really they head to different places across the state (sometimes they’re gone for days) looking for anomalies.

-Seeing how they went to visit their great uncle Stanford in the words, people assume that grunkle Stan and great uncle Ford are the same person; storytime can get rather confusing.

-They bury their book when they’re not using it, in different locations each time.

-Their folks don’t know it, but the Pines household has become a sanctuary for magical creatures. As long as they aren’t seen by anyone and only take what they need, they can come and go as they please.

-Dipper and Mabel realize on the first day of school that they really don’t fit in with kids their age anymore. Highschoolers, however, find they can relate to them with ease. Also, they’re pros at hanging with old people, whereas other kids their age don’t know exactly what to say or do.

-They burned all their letters home. No one will ever read them.

-They actually like using triangles in math class; they can draw all over them and make them into different things.

-Despite how fond they seem to be for Gravity Falls, no one actually knows what all happened there. They always say that the fishing was nice.

-Whenever they say “You’ll need to know this as a law-abiding citizen of California”, or something along those lines, they exchange a look, because they’re not law-abiding and they don’t plan on staying in California.

-Before the next summer, Dipper and Mabel get arrested at least twice; once for shoplifting, the other for trespassing.

-The one time someone tried to pick on Mabel, they received a punch to the face. From Mabel. And Dipper. Everyone is astounded to find out there’s muscle under their baby fat, and that they can box.

-The one field trip they go on into a swamp ends in disaster when rumors of a beast float around. Dipper and Mabel disappear overnight, then stroll into camp the next morning deeply disappointed; fresh-water sharks, alligators, and an eel, but no monster. Why is everyone looking at them like that? Is it all the mud?

-Mabel wants brass knuckles for Christmas.

-Dipper wants a ray gun. (He’s building it himself.)