I think there are definitely a few people who do these interviews in order to get over that kind of anxiety. some people do stand up for the same reason—I think Daniel Tosh has talked about this? Horrible anxiety, but he has developed a whole stand up persona, and the stand up persona lets him come out when he needs to.
Power through the interviews, just deal with a few hours of rejection, and hopefully you'll come through it feeling more comfortable with yourself, right?
