DISCLAIMER: Gravity Falls belongs to Disney Channel (And is the best animated show)
Dipper sat arms crossed under the tree reading the book he had found under the ground. His suspicions on Gravity Falls grew higher and higher. He'd seen some things he'd never dream of back in his own bed. Everything wouldn't lighten up. There was misery all over his face as he kept reading about cursed doors and vampire bats. Mabel hopped around in the fields talking to herself, what an idiot. Dipper knew no one more imaginative and optimistic even as much as misery loved them. They were caught in some town that had it out for them. Uncle Stan was hustling tourists money one by one with Wendy and Soos in the shop. Mabel seemed to be talking to herself as if there was a person right next to her. She sat down staring at the sunset clenching something. As Dipper noticed the sunset he got up and walked over to Mabel.
"Don't come crying to me when your lost in the woods at night." He mumbled as he kept walking showing no attention to Mabel's reaction.
"No Dipper, wait! The sunsets so pretty! What do you think Christopher? Let's head back to the Mystery Shack!"
Mabel skipped through the woods swiftly catching up with Dipper as he crunched through the leaves. It was going to get dark soon and the woods at night is not the best place to be. People lose their minds, as well as their sense of direction. Also strange things they'd seen earlier this Summer would surely be ready to make a second appearance. He looked at the sunset and headed West, that was how he'd get back. Once they saw the Mystery Shack they saw their Gruncle Stan outside the Mystery Shack with a frustrated look on his face.
They started running knowing they shouldn't be caught in the dark. Dipper and Mabel went straight to their beds skipping on dinner. As Dipper tried to open the door to their room it wouldn't budge. It wasn't locked but the handle just refused to move. Dipper knocked on the door and it didn't make a sound as if it were the thin door they usually dealt with. They called Stan to the door. He cracked his knuckles and with a wide grin, turned the handle with ease.
"The handle too much for you, eh Dipper? Gotta manhandle it!" Gruncle Stan joked. Dipper was not amused and gave a big sigh going into the room. As Dipper sat down he was too angry to notice the changed surroundings.
Everything was opposite, the wallpaper was the same brick red as the beds used to be, and the beds a deep green shade as the walls had been. Mabel just sat down at the edge of her bed, insisting Christopher rest. Dipper still wasn't sure who Christopher was and as is temper rose, he noticed the changed environment wondering when this happened. The incident with the door was strange enough but this was a bit out there.
Gravity Falls was a place that you knew you had problems if you got used to, you knew something was wrong in the brain. Dipper sat propped up on his bedpost thinking about how much he hated life right at the moment staring at Mabel sleeping at the edge of her bed. Mabel started having hallucinations when Dipper and her moved from their cozy childhood home. As for Dipper, he never quite fit in his whole life and formed clinical depression. It was Dipper's fault they ended up in this strange town. Dipper stayed out of the house and decided to take the local bus and go wherever it took him.
Luckily his parents were worrying and had the police take him home before he had the chance to board the bus. Their parents, worried to death decided to ship him and Mabel off to Gravity Falls to get some fresh air and hopefully clear their heads. Mabel was snoring like a little piglet, Dipper got up and moved her to the middle of the bed and tucked her in. These were the rare moments where he couldn't help but smile at his adorable kid-sister. He sat back on his bed and eventually drifted to sleep.