Life In Gravity Falls

The Store - Part One

You guys had a blast, eating all the snacks, playing the video games, and having food fights. Your favorite part was when you all sat in a circle, placed a giant Pitt Soda bottle in the middle, and dropped three mentos in it so it exploded and rained soda on all of you. Mabel even found some smile dip, and is currently lying on the ground in the corner because she ate too much.
Right now you're sitting on the top of a shelf with Wendy and Dipper, watching as the guys pour a bag of ice down Thompson's pants. You lick the popsicle that you found in one of the coolers.
"This night has been, like, legendary!" Wendy grins.
"Yeah," Dipper says.
"Aw man." you look down to see Nate holding an empty bag of ice. "We ran out."
Dipper jumps down off the shelf, tossing his popsicle stick in the trash. "I'll get some more," he tells them, and walks back into the isle.
"So, y/n," Wendy looks at you. "You three are 13, right?"
You almost forgot that Dipper had lied about you guys' ages. "Yeah."  you say, "13. Technically t-"
You're cut off by a high pitch shriek coming from the freezer section.
"Dipper?!" you yell, dropping your popsicle, jumping off the shelf and running down the isle. You're closely followed by the rest of Wendy's friends.
Dipper is standing in front of the ice box, his face pale and a bag of ice open and spilled on the ground.
"Dipper, whats wrong?" you ask.
"Yeah, man, you freakin' out?" Lee teases.
"Its - I just, well I..." Dipper stutters, "Oh hey!" he exclaims and points in the other direction, "Its Fancy Pants Revolution! The game that tricks people into exercising!"
Wendy's friends immediately turn and run towards the game, Thompson getting there first. You start to move in that direction, but Dipper grabs your arm.
"y/n!" he whispers, "I think this place really is haunted! I saw something in the ice box...something I couldn't even explain to you if I tried. That's why I screamed." Dippers face is starting to go back to its original color, but it's still pretty pale. Whatever he had seen must have been freaky.
"Hey guys! Come look at this!" You hear Robbie yell from the other side of the store.
"Okay." you say to Dipper. "I believe you. Lets just try and get through the rest of the night."
Dipper takes a deep breath. "Alright."
You both walk over to where everyone is huddled around something on the ground. They move out of the way so you can see, and you gasp.
On the ground are two chalk outlines of people, the kind of which you'd usually see on murder mystery tv shows.
"The legends were true." Tambry gapes.
"Hey, Nate. Dare you to lie down in it." Lee elbows Nate in the side.
Nate grins and walks over to the outlines. You start to get a bad feeling in the pit of your stomach.
"Guys, look! I'm a dead body!" Nate is just about to step over the chalk line when Dipper speaks up.
"Hey, uh, maybe we shouldn't do that." he says. "I mean, what if this place really is...haunted?"
"It could be possible." you say slowly. "Why take the chance?"
Wendy's friends frown, and Tambry pulls out her phone. "Status update. Trapped in store with insane 9 year olds."
"Hey!" You protest.
"We're not 9!" Dipper snaps, walking over to the outlines.
Your eyes go wide. "Dipper, what are y-"
"We're 13!" he lies down inside the chalk. "Technically  teens!"