Mabel emerges from her and Dipper's room like a shot, wielding her grappling hook like she's about to shoot somebody in the face with it. Weirdly, she is already dressed for the day.

Look, she doesn't sleep in. She has a healthy sleep schedule unlike literally everyone else in this family.

"What happened? Who're we messing up?" She has no idea if it's that kind of family meeting, but Ford seems dangerously anxious what with all the knocking and disturbing the peace, so clearly it is a day for grappling hooks.