I've had some funny yet embarrassing experiences... When I was doing card to mouth (dan and dave), at the point of putting the card in my mouth, the spectator, instead of pushing "his card" in, he looked up, and said, "what are you doing?" Failure... Never really liked that trick.
Many times, when I do a double lift, people say, THATS 2 CARDS!
What is really annoying is that when I'm using a svengali deck, it gets amazing
responses, and then people ask for the deck...
Worst was probably when I was doing Chinese Linking Rings, and I dropped the key ring...
I guess this is just because I'm clumsy, but I don't know how to respond, and it really throws me off...