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."