Do not bother Pittsburgh Steelers coach Mike Tomlin while he is working.

One Steelers fan learned that lesson the hard way on Sunday, as he tried to give the Pittsburgh head coach some words of encouragement during halftime. You would think Tomlin would have been in a pretty good mood at the time, as his team was leading the Atlanta Falcons by a score of 16-6 at the break.

However, Tomlin was having none of the kind words, as he yelled at the fan, “Man, I’m f-cking working!”