Jeopardy! jitters

In 24 hours I'll be taking the Jeopardy! test and (if I pass it) doing a mock-game screen test. As far as I know, once I've passed the written test, it doesn't really matter how well I do in the mock game, so long as I'm charming and obviously enjoying myself. Actually, I'll bet that it would reflect well on me if I lose cheerfully.

I'm getting a bit nervous...