[Francis-134]

From the way it sounds, it seems that the mentor in question has just become frustrated with the situation, which is perfectly natural. I would like to say that this is wrong, but everyone goes over the top from time to time, especially in a stressful situation.

If you really feel this is inappropriate, then find the mentor and talk to them about the whats going on. As a fellow student, it would certianly be appropriate to speak with the students in question and ask them to be quiet during meetings.