REVERE, Pa. (AP) — A woman walking a horse up a hill in eastern Pennsylvania became trapped after the animal died suddenly and fell on top of her.

Authorities say the bizarre incident happened Sunday afternoon at the Bucks County Horse Park in Upper Black Eddy. Firefighters who responded to the scene were told to turn off their sirens so the other horses wouldn’t be spooked. They lifted the animal off the woman, and she was transported to a hospital.

The Philadelphia Inquirer reports that she suffered non-life-threatening injuries.

It’s not immediately clear why the horse died.

The 123-acre horse park is located in Revere and hosts a variety of equestrian events for all ages and disciplines.

(Copyright 2013 The Associated Press.)