When I'm on my own I can be negative. I need my friends and family around to help pick me up if I've had a bad qualifying session. I think insecurity plagues a lot of sportspeople.
You learn timing on the road. You learn structure and how to read an audience. You learn so much about the business of laughter that you can't learn on a set because it's all on you. Sometimes you bomb and you know not to tell that joke again... You just hope people find the humor in the awkwardness.