Creature in the Closet



 was the original Gravity Falls promotional. It was aired for several months before the series premiere, and can now be seen on the Gravity Falls official website.

Synopsis
The clip begins with a time card that reads "HOUR 1." It shows Dipper's and Mabel's closet through a video camera. Mabel asks if the camera is rolling, and Dipper tells it her it is. Dipper proceeds to describe what he witnessed, only to be interrupted by Mabel, who waves and says she also saw it. Dipper then says that he and his sister are trying to lure a creature that took a bite from his sock out of their closet. Mabel doubts that the creature is even in there, but it moves around in the closet and causes the twins to fall down.

The next time card, labeled "HOUR 2," is seen. Dipper states that the creature still has not left the closet, and Mabel attempts to make a scary sound effect. Dipper than tells Mabel that the monster could come out of the closet at any time, so they must be prepared. Mabel abruptly shouts, startling Dipper, but just states that her brother's fly is down, much to his annoyance.

In the third hour, Dipper says the creature could be "the scientific discovery of the century," and Mabel that it is probably a possum. Dipper, extremely irritated, says that a possum could not stand on its hind legs, climb up wall and leave a trail of purple slime. Mabel says it sounds adorable.

And then, in hour four, Dipper plans to lure the creature out with a bag of chips. He points the camera at the closet, then back at the floor when he realizes the chips are gone. It turns out it was just Mabel, who has already forgotten and ate the bag of chips and says,'Yum, nachos!'

In the fifth and final hour, Dipper worries that the camera will run out of charge before he and his sister can get it out. He tells Mabel they must hurry, and Mabel says he owes her five dollars if it turns out to be a possum. They open the door together, and are attacked by the creature. The screen goes fuzzy, then shows a sideways view of their bedroom floor. Mabel screams that the creature is "not a possum! It's not a possum!" and the clip cuts to a card with the Disney Channel logo on it, and finally a "coming soon" card.