Mike yawned. He wasn’t use to the late nights yet. It was only his second night shift, as far as I’m aware, and by the time he had crossed the room to grab his sixth or seventh drink of coffee from the machine just outside the office door, I was started to get irritated by him. He was a lot younger than me, about 20 years old, and the age gap annoyed me since he acted like a child most of the time. My usual co-worker for the night shift was on a vacation with our boss, since the two knew each other from college and had remained friends, so Mike was moved from the day shift to join me…