An Alabama fast-food worker who allegedly threw hot grease on a customer during a dispute over service in the drive-thru line is facing an assault charge.

Police say the 50-year-old woman was charged Monday following a confrontation that occurred Saturday afternoon at an Arby’s restaurant in suburban Birmingham.

Authorities say the worker threw grease on a customer in the drive-thru line, but they didn’t provide details on what happened.

The victim suffered second-degree burns over a large part of her body and was hospitalized.

She’s filed a civil lawsuit seeking an unspecified amount of money.