Jessie does the only thing she can possibly do in this situation, seeing herself as something less than human, different than what she was before...
She screams, stumbling back and slamming loudly into the lockers behind her as she trips on the bench. Her head slams hard onto the floor. Dizziness creeps over her, as does a heavy nausea. She struggles to get up, but the black creeping in on the edges of her vision and the sudden exhaustion are overpowering.
She makes one last desperate attempt to stand up, pushing from the hooves that used to be her feet and struggling to get her arms to push up as well, but it's no use. Her head was hit too hard, and she falls into a troubling unconsciousness.