Grading on a transient loop...

Long before The Big Bang Theory appeared on the TV scene, there was 3rd Rock From the Sun, starring John Lithgow as an alien visiting Earth in disguise. Naturally, he has to blend in, and does so by becoming a physics professor at the local university. In this classic scene, he vents his frustration on his hapless students, mere mortals who can't grasp his unique grading system.