Here’s a new concern about grilled burger you’ve probably not heard about: A Connecticut woman who was rushed to the hospital with extreme stomach pain days after eating a grilled burger was found to have a thin, inch-long piece of metal from a grill brush in her intestines.

Cheryl Harrison underwent surgery to remove the metal, and doctors are now warning other backyard grillers to be aware of the potential dangers, Yahoo.com reports.

“Obviously, if it was in my mouth and I bit it, I wouldn’t have swallowed it,” Harrison told Connecticut’s News 8. “It must have been positioned in that burger just perfect, and I ingested it and swallowed it.”

Lawrence Dell, M.D., of Lakes Urgent Care in Michigan said such cases are not as rare as you might think.

“I do see the ingestion of foreign materials — bristles, coins, needles, pins, things like that,” he told Yahoo.com. “Sometimes it’s inadvertent because the person did not feel, see, or touch the foreign item before swallowing it.”