I had many pugs that I smiled at, but mostly at the jokes that people make. And the players who pull like fucking crazy and say "Muwahahaha"
But the only time I ever nerd raged (1 time) was in a kara pug in Dalvengyr US server. We were stuck on maiden (3rd boss). Wiped like 10 times before getting it down and I was so happy just to kill something that is so hard to down.
PS. Dalvengyr stinks !!!