Video of Najee Harris, the referee goes viral - NFL World React

In Saturday's exhibition game when the Pittsburgh Steelers

Najee Harris did not take the field when he defeated the Jacksonville Jaguars.

However, the running back made sure to stay alert on the sidelines.

As captured by Alex Kozora of Steelers Depot,

Harris raised his fist in defense as he came into contact with a referee.

Head coach Mike Tomlin missed the entire sequence, revealing right next to him.

"Stay dangerous," Harris replied to the clip on Twitter.

Steelers fans are shocked by the 24-year-old's antics.

Maybe he was protecting Tomlin from the referee. If so, one might wonder

whether he would have jumped to the rescue of Nick Saban in the same way.

1,667 yards and 10 touchdowns during a stellar rookie campaign

Upon achieving that, Harris was doing all business on the field.

He's set to see Pittsburgh's featured appearance in 2022.