Hey Everybody knows sometimes are naturally a little nervous. Especially an interview. I would love to watch one of those hidden camera shows about interviews. I'm sure yours went well. There are ways to get off the hot seat for a minute or so by asking a question like: "How Old is the company?" or "How specific is the products line?" etc.. give you a minute to listen and build up spit.
Good Luck John, We're praying for you.