Absent-minded professors

There were three professors at the railway station. They were deep in conversation. The train had just arrived, but they did not notice it.

Then the guard shouted, “Take your seat, please!” The professors heard the guard and rushed for the train. Two of them got on the train before it moved. The third one was left behind.

It was Professor Egghead. He looked sad. One of professor’s students was at the station. He tried to comfort the professor. “It wasn’t really bad, Sir,” said the student. “Two out of three caught the train. That’s quite good, you know.”

“I know,” the professor said. “But it was my train. My friends only came to say goodbye.”