I once sat in a meeting for over 2 hours, after work, while a couple of very excited fellas with said pen and chart lectured us on different seals and o rings.
I had to use all my will to keep awake, and stop myself from jumping up and saying something along the lines of 'ffs this is of no use to me, I'm going home to my family and if I get the bloody sack, so be it'. But I didn't and I still regret not making a stand, literally.
My boss, who was present, apologised next day for putting us thru it. Crap boss, which is why he didn't stop it.