A porter at a Detroit-area Ford dealership punched the store’s used-car manager in the face after being repeatedly asked to remove his earbuds, police said.

The manager told police he twice asked the 21-year-old porter to take out his earbuds so he could hear which vehicles needed to be moved on the lot, TV station WDIV reported last week. The employee then made a fist and struck the right side of the manager’s face.

When the manager asked why he did that, the employee said, “Because you were going to fire me.” The manager then said he wouldn’t have fired the porter over the earbuds, he but did fire him for throwing a punch. The former employee also might face assault and battery charges, police said.