Jill Horvatic, who was inside Stout Carpeting in Castle Shannon when the deer entered the store Tuesday, said the animal caused a lot of damage inside the shop while trying to find an exit, WPXI-TV, Pittsburgh, reported Wednesday.
"Honest to God, I was shaking. I haven't felt like that ever in my life," Horvatic said. "For 20 minutes all I heard was banging and glass shattering. It was horrifying."
Police set up barricades inside the store to help the animal find its way out.
Authorities said no injuries were reported.