As I'm sure you are all aware, academicians have some of the biggest egos on the planet, and often don't play well together. I was a shiny new grad student attending one of my first brown bag presentations - basically faculty have their grad students present research from the lab to the rest of the faculty. It is supposed to be a fairly low-key event where the student can benefit from faculty input in a supportive environment. Facutly didn't really mess with me, because my professor was well liked, and because in California, most people believed that a Mississippi redneck such as myself probably was carrying weapons and knew how to use them.
We had two profs in the department who absolutely hated each others guts. Both were famous in the field and well funded, and the turf war between them spilled out into the department in all kinds of ways. So, here we are at the brown bag, and professor A's student, an attractive 2nd year Ph.D. student, is presenting on her collaboration with Prof A. Professor B's grad student asks a question about the project, doesn't like the answer, and asks a few more, with the tone becoming more aggressive. Professor A decides to weigh in, and tells the questioner that he doesn't understand the work, probably because he has never taken his course, and he needs to back the 17 off. Prof B doesn't like this at all. He says you can take all the classes under the sun, but if its a stupid study one day, well, it will be a stupid study the next (the girl presenting is standing there looking really uncomfortable). Prof A bows up and tells prof B that just because he obviously doesn't understand it, probably because he can't understand the math behind the model (these are cognitive psychologists) doesn't mean it isn't a great project, and the air force must think so as they've funded it for 4 years, and he has twice the grant money and grad students that prof B does. At this point, they have both stood up and are facing each other across the conference table. Professor B then says, I **** you not, "I know all about your grad students *******. Hell, I've been sleeping with this one for two months" as he points to the presenter. Well, with that turd dropped, everybody just sits there looking at these two freaks. The presenter, now fingered for 17ing her way to the top, turns and leaves, some other profs ease on out, and eventually we all just back the hell out of there.
That was one of many memorable exchanges between these two.