Mabel opened her eyes to blurry trees and grass. Her head hurt immensely, and her body wasn't any better off. Her mouth felt awful, her teeth felt oddly shaped in her mouth (though her braces were still there) and her jaw ached. It also felt dry. Very, very dry. Her legs were sore to the bone and her feet… she didn't even feel. Finally regaining her sight completely, she looked down at her pink, hard hooves.
Hooves.
This was when she started to freak out. So many questions filled her head. Where was she? Was Dipper okay? Where was he? And most important of all, why on earth was she a PONY?
She then noticed the tan, brown maned, presumably male pony with a blue hat behind her, lying on the ground, unconscious. Dipper.