I have to admit that I'm a real tight-ass when it comes to low brow. Unless it's COMPLETELY purposeful to the comedy, going for the easy shock laugh kind of turns my stomach.
That being said, this thread has made me laugh more than any other thread on the board, so go figure. Erik, the Princess Diana thing may be the funniest improv moment I never saw. Which I'm glad of, because I apparently would have been a lone voice laughing hysterically, thus drawing the audiences' hate from you to me.
Was it a ninja scene, Dyna? Yes, I think you're right. One must not forget that the primary reason that scene was such a success was the die-hard commitment and fart-noise ability of Joanne Morrison, pre-Ice-9.
As for myself, the first thing that comes to mind is the queef Harold. Vaginal farts, ninja farts -- we got it ALL, people!