"Hey, hey, hey." Bill poked Dipper on the cheek incessantly, annoying the brunette to no end. Dipper groaned in annoyance. "What do you want?"

Bill looked slightly offended before he threw a wide, unsettling grin onto his face. "As glad as I am that you're reading that book I recommended you," He glanced down at the book Dipper was holding titled 'Flatland.' "Let's get back to what's important here, me."

Dipper snorted. "Did you need something?" He asked a little wearily but with evident amusement shining through.

"I'm so glad you asked Pine Tree!" Bill chirped knocking over a couple of cans of Pit Cola stacked on top of the dinosaur skull/makeshift end table. "Today I was watching over-"

"Spying on." Dipper corrected.

"-this town of idiotic flesh bags when I saw the most interesting human ritual in the park."

"What are you talking about?" Dipper asked wearily.

Bill started jumping up and down excitedly as he explained. "So this one fleshbag hunts down a group of fleshbags and infects one of them and then the infected fleshbag has to hunt down another and spread the disease to them instead! It looked really fun." He grinned as the telltale sound of Mabel running down the stairs started.

"That," The brunette said, looking very concerned, "Sounds like a viral outbreak. Shouldn't we-"

Suddenly he was cut off by his over-excited sister leaping down the last ten or so steps. "Did someone say tag?" Bill snapped his fingers and slung his arm over Dipper's shoulder, around his neck and finger gunned at her, causing her twin to choke.

"That's it!"

"So you want to play tag? I love tag!" She tapped Bill on the side of the head.

"You're it!" She declared, racing out of the room. "You hear that, Pinetree?" Bill went from excited to maniacal in a second, grinning in a sadistic way. "I'm it."

Dipper paled and rapidly scrambled away from the demon and out of the shack as fast as his 14-year-old legs could carry him. "Mabel wait for me!"

Bill ran after him and chanted in a song-songy voice, "Run run as fast as you can but you can't run from Bill Cipher, as he is a transdimensional Triangular Dream Demon and therefore does not play by the laws of physics on a physical plane of existence." He cackled maniacally as he chased the twins, one screaming with glee and the other in terror.