Most students enter a room calmly. Andres announced his presence. He headed right for the teacher's desk, and he sat in the teacher's chair. As this was the chair I had been using (I was standing as the class entered), I told Andres to find another seat.
"But Mr. D always lets me sit here."
A glance at the teacher told me this wasn't true, and the teacher told Andres to get to his own seat. He did, but then he started talking loudly. Humming. Rocking in his chair. I told him to settle down or he would spend the period in a not so nice place.
Then another student rushed across the room. Andres stood. They started menacing each other. I got right in the middle of the two of them and told them to settle down. No fighting.
"We're not going to fight. We're going to have a jerking contest."
Also inappropriate, and I said so.
I got busy dealing with other students in the classroom. Then I saw Mr. D kick Andres out. I wasn't at all surprised. But Andres was.
"But I didn't dooooo anything..."