No matter what - rehearsed, under-rehearsed, over-rehearsed, doubts about rehearsing - the first gig is always the first gig, and you put on your little praying hat, batten down the hatch, and do what you do.
“In short, it is not that evolutionary naturalists have been less brazen than the scientific creationists in holding science hostage, but rather that they have been infinitely more effective in getting away with it.”