A college physics professor

A college physics professor was explaining a

particularly complicated concept to his class when a pre-med student interrupted him.

“Why do we have to learn this stuff?” The young man blurted out. “To save lives,”

the professor responded before continuing the lecture.

A few minutes later the student spoke up again.

“So how does physics save lives?” The professor stared at the student for a long time.

“Physics saves lives,” he said, “because it keeps the idiots out of medical school.”