You shouldn't humiliate your professors.
Bruce is taking a nuclear physics class at Harvard University.
Bruce wants to correct his professor's mistake during a class about gamma radiation.
Bruce asks the professor a clarifying question, giving the professor a chance to catch his mistake.
Bruce interrupts the lecture to tell the rest of the class that the professor made a simple mistake that anyone should have noticed.
The professor thanks Bruce after the lecture for noticing the mistake, and the two become friends.
The professor gets upset and gives Bruce a bad grade on the next exam.