NFL referees take their job very seriously … even if they have footballs thrown at them.

During the Detroit Lions and Dallas Cowboys game on Sunday, the referee was calling a holding penalty against the Lions when running back Jamaal Williams flipped the ball at the referee, and it hit him in the head.

But, completely unfazed, the referee continued to make the call, sending the Lions back 10 yards while Williams was trying to apologize for hitting him in the head.

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NFL referees discuss call

Referee Jerome Boger, left, line judge Rusty Baynes (59) and umpire Barry Anderson are seen during the Indianapolis Colts and Jacksonville Jaguars game at Lucas Oil Stadium on Oct. 16, 2022, in Indianapolis. (Michael Hickey/Getty Images)

Another referee came in to confront Williams on his decision-making there, but nothing else transpired.

The referees had another good moment earlier in the game when one noticed that Amon-Ra St. Brown, the Lions’ top receiver, seemed unstable after taking a big hit from the Cowboys. A referee swooped right in to make sure the Lions took him off the field and enter concussion protocol.

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After tests, St. Brown was ruled out for the rest of the game with a concussion.

NFL referee on field

Referee John Hussey looks on during the game between the Dallas Cowboys and the Philadelphia Eagles on Oct. 16, 2022, at Lincoln Financial Field in Philadelphia. (Andy Lewis/Icon Sportswire via Getty Images)

It’s a tough job for referees in this league, and you truly never know what’s going to happen. Even errant throws while trying to make a call can be dangerous.

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The game itself had 15 total penalties called, eight against the Lions and seven against the Cowboys. Dallas would end up winning this one, scoring two fourth-quarter touchdowns in the return of Dak Prescott at quarterback for a 24-6 victory.

Prescott finished the game with 207 yards with one touchdown pass, while running back Ezekiel Elliott had two touchdown runs with 57 total yards on the ground. Peyton Hendershot, the rookie tight end, caught Prescott’s only touchdown pass.

Jamaal Williams point for first down

Jamaal Williams of the Detroit Lions reacts after a play against the Dallas Cowboys on Oct. 23, 2022, in Arlington, Texas. (Cooper Neill/Getty Images)

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On the Lions side, quarterback Jared Goff had 228 yards but two interceptions and no touchdowns.