It had been many years since the mystery twins had set foot in Gravity Falls. Yet, they could not resist visiting it one last time before they grew up and went to college. The trip took hours, but they were very content with driving the distance just to relive childhood memories. Regardless of the summers that have passed, the childlike Wonder still filled their minds as I saw the familiar billboard welcoming them to the town.
Mabel had driven most of the way, with hopes of surprising their great uncles as well as the silly Mystery Shack owner Soos. She was especially excited to see her old friends again, though she knew they would not be the same. They had grown up after all, and with age came new experiences which likely changed them in differing ways. She didn't even know if they still lived in the small town, but she figured that at least one had to.
Dipper sat in the passenger seat, his hand scribbling into his personal journal; following in his great uncle's footsteps. It was his way of ignoring Mabel's loud and rather obnoxious pop music that boomed from the stereo of her measly vehicle.
By this time Dipper grew extremely nostalgic, as he read that billboard, "Welcome to Gravity Falls."
Mabel looked over briefly and smiled, "I hope we beat the rain."
"Talking about the weather now? I didn't figure we dropped our standards so low." Dipper joked softly with his twin.
Mabel snorted, "Sure, yeah. Man, you missed this place, huh?"
Dipper closed his journal, and sat up to get more comfortable, "Of course I did! The mystery, the magic, the risk and adventure! What's not to miss?"
Again she glanced at her twin, a large smile filling her round face, "Take it easy there cowboy, you might fall off your horse."
Dipper smirked, taking this as a challenge, "Oh? Is this really coming from the sock puppet queen? What run out of laundry?"
She let out another snort, "Sure, sure; but at least I don't talk to myself!"
"Obviously I need to record you when you sleep, because you basically monologue your dreams!" He began to mock her voice, "Oh, Alexander Hamilton; your worth is more than ten dollars!"
She was going to continue this little sibling session, however, she was caught off guard by Dipper, which of whom suddenly screamed, "Mabel watch the road!"
But it was too late now, as soon as she turned she saw a shadow hit the hood of the car. She swerved and lost control, crashing right into something hard. They hit the dashboard, and comciousness of the twins faded.
Worse of all, Dipper had realized on the split second of impact; was that no one knew that they were coming. No one knew they were there at all.