Is Whitney Cummings filled with rage?

At one point in Jeff Ross's part, he remarked that Whitney Cummings yells out her jokes, almost as if she's desperate to make herself heard. I think out of all the people on the dias she's the one that isn't having fun. Of course, she's laughing like a hyena like everyone else, but I think she's a very angry person. And why the out-of-the-blue John Travolta gay joke? And get that body language: legs crossed in a vice-like grip. No, there's something wrong with that woman.

There is no "off" position on the genius switch.