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 frustrated student blurted out.

“To save lives” the professor responded and then continued his lecture.

A few minutes later, the student spoke up again. “So how does physics save lives?”

The professor glared at the student, and announced to the class, “physics saves lives, because it keeps idiots out of medical school.”