My fave video of a conductor at work was one directing the Seattle Symphony (edited--found the vid) and they were doing "In the hall of the mountain king".
The comments were the best. My favorite one said "This conductor knows all 7 forms of lightsaber combat." And on and on it went.
I'm not surprised some of them are dripping sweat by the end of a concert.
Edit: Ze Vid--
https://www.youtube.com/watch?v=4nMUr8Rt2AI