I once witnessed a wily 40-something Master's student torturing one of the department's young star PhD candidates. The PhD student had caught one of his mistakes and was taking it back, as any honorable academic should. The Master's student continued on, pretending as if the PhD student was insisting on the correctness of his earlier assertion. You could see the urgency with which the PhD student was trying to roll o…
Edit: I think I see now. The master's student was the distressed one.