A rookie drill instructor escorted his first batch of new recruits to the mess hall. He told them, “There are three rules in this mess hall: Shut up! Eat up! Get up!”
Checking to see that he had everyone’s attention, he asked, “What is the first rule?”
Much to the amusement of the other instructors, 60 privates yelled in unison, “Shut up, Drill Sergeant!”