I know what you mean. When I switched from auto body work to office work, I was very, very nervous about the interview process. Turned out I got the first job I interviewed for, and seven years later I'm still working for the guy I interviewed with. He told me a few years later that I was crap in the interview, but he hired me anyway because he could tell I was just nervous. Lucky for me I've got a great boss.
As a side note, I'm working at the third place under the same boss. He's changed positions twice since he hired me. He called to hire me for the new location both times.
-S