I don't know. The problem is that most magicians think that there's a way out of every mess up. There is not I'm afriad. There's only how to avoid it. like practice more, it's harsh and I'm sure you've heard it a thousand times, but so did I. And it's true. Think of it like an illness - prevention is a crap load better than cure. And not all illnesses have cures.
I know that much, practice and practice some more, but even the most practice cannot make it perfect, everyone messes up. I have not yet in this situation, but just in case I need some out's or lines because I want to start performing tricks like Sam the Bellhop. I just don't have any ideas for outs.