It was an average night in Gravity Falls. As average as you could get. Except for two things, Stan was throwing a party, and the zombie apocalypse was at the Mystery Shacks doorstep. They already infected Soos, and had chased Dipper, Mabel, and Stan up into the attic.
"Dipper, can't you find a way to stop this in your Journal" asked Mabel. Dipper franticly searched his coat pockets for his trusty Journal 3, but only found a big hole where a zombie teared through his vest.
"Mabel, I think I lost it." He gave her & Stan a terrified look as if it was all over.
"Don't worry kid, we'll find a way out." Stan said between punching zombies between the door and the room.
"Wait a second, I've got the perfect Idea." Said Mabel triumphantly. She ran to her bed and pulled out something from under it. She crawled out from under it and did a spin to show off her…
"GRAPPLING HOOK!" She yelled. Mabel shot through her and Dippers bedroom window and hooked it around a tree. Dipper then grabbed hold of Mabel. Stan was able to lock the door shut and hold on to the grappling hooks wire.
"Uh…Is this safe?" asked a frightened Stan.
"I'm 90% sure." Said Mabel as she retracted the wire sending them all through the air. The only problem was that the wire couldn't hold all their weight. The wire snapped half way though the flight and landed them on top of a zombie, crushing his skull. The twins got up quickly, Stan however had some trouble getting to his feet.
"Darn these old man legs" He said shaking his fist. He was able to get up just in time as a horde was swarming in on them. Stan used his brass knuckles to break a few zombie's jaws. Dipper found a big stick on the ground and started whacking zombies. Mabel was throwing stones at a very tall and skinny zombie till it fell over. That was, until the horde surrounded them, and they were outnumbered.
"Come here kids" Stan said, soft and slowly. They all grouped up waiting for the inevitable to happen. Fearful that this was there end. Until they heard a loud horn. Then a large brown truck barreled through at least 3 dozen zombies. It stopped in front of the gang as a car door opened. A red headed teen could be seen driving the car wearing a green, plaid shirt.
"Get in" she demanded. Dipper and Mabel climbed over the seat and got into the back. Mabel at the far end, Dipper in the middle, and Tambry on his right, looking freaked out and trying to work with her blatantly broken phone. Stan hopped in and shut the door on a zombie's head, who was trying to get in. Wendy turned on the windshield wipers to remove the blood and brain from the truck that belonged to Soos. She then switched gears into reverse and peeled out over a few more of the undead. The guts and blood splattered all over the car side and back. Dipper and Mabel shut their eyes so they wouldn't have to see any more of this nightmare. Little did they know; the Nightmare had just begun. Wendy got the truck out of the woods and onto the infested streets of Gravity falls. They could see lazy Susan fending off zombies with a broom. They wanted to stop and help her, but there was nothing they could do.
"What happens now" asked Mabel.
Wendy replied "We get as far away from here as possible." She narrowed her eyes to keep focus on the road. As they drove off one thought kept entering Dippers mind. If this was the last time he would ever see Gravity Falls.