Indeed it does!
And Queen of Clubs, you're not alone - adrenaline gets the best of my hands too. It's a b*tch. That's why despite all the fancy sleight work I practice, when it comes to my favourite spec routines they're ones that I know aren't going to go to pot just because my hands aren't totally steady.
Worst performance I've seen - well, it's hard to say. I've seen young teenagers start out, over keen and unwilling to listen, and they've been cack. But it's not exactly fair to compare them to some seasoned card man, is it?
But the worst overall has definitely been my own. First gig, charity event - opened with holy moly which I fumbled because my hands were so sweaty and the polite response suggested I'd given it away. Tried to go into anniversary waltz but realised as I was getting them to select a card I was set up wrong for it, so instead of going into something else I panicked, apologised and put the cards away, pulling out some rope for a professor's nightmare trick which - you guessed it - I fluffed.
I chatted to the couple in question for a few minutes afterwards so they were pretty friendly and forgiving, and before they left I apologised for my total balls-up and showed them one last coin trick which they genuinely did enjoy, but still - terrible.
The silver lining was I performed perfectly for the rest of the night because I thought "it can't get any worse"! What had thrown me off to start with was that I'd arranged with the organiser that I would do the evening (it was a meal/barn dance thing) for free as it was my first "gig" and for charity. So I strutted in there, looking cool in my black jacket, my pocket stuffed with wonders to show people who would all of course assume I was a magician in at least some semi-professional if not professional capacity... only to hear the organisor announce over the PA,
"and we've got Tom to entertain us this evening, he's magician. Well, he's practicing to be a magician." (or words to that effect)
Thanks a ******* lot

Hardly a confidence booster as a I walk to my first table...!