One time my Professor took 20 minutes to try and set up a powerpoint presentation, called the tech people, tech people didn't help, YELLED at the tech people, and then told us to go home.

Thing is, I think troubles with the projector has been a problem in like 80% of my classes, and the tech people are always soooooo slow about responding and helping and sometimes they make it worse. It's funny to watch people with PhDs struggling with this stuff.