The outburst came suddenly from the middle of the cafeteria. He wore a white lab coat, pocket stuffed with pens.

“That’s it!” he shouted, quickly rising to his feet, his lunch try clattering to the ground. “I’ve had it! I’m done!”

The chatter stopped, as he stood hunched, face red with fury, in both the geometric and mental center of the room.
“I’m done being a part of this,” he said quietly and wearily.

And with that, he disappeared.