Another part of the process that I absolutely love, which is kind of just before you open if you're fortunate enough, and that's to have previews. Sometimes its just one and sometimes, depending on where you are, you might have five or more. And in the previews I always say to the actors, I'm going to keep working through the previews, so I might change things. And normally, I'd say nine times out of ten, I do change things. Partly because I'm still trying things out and I don't know how it's going to work. Also, it's the first time that an audience will have seen it. And so you kind of start to get - not that your going with you know, oh if the audience laughed at that bit then I have to keep that bit - not that at all. It's much more about the look of it, and the feel of it, and whether or not those moments that you hoped for worked. Comedy is very difficult because you know one night they might laugh at one thing and another night they laugh at something else. So you can't really use the audience too much for that. But there's other things that you can get a feel for as you watch and you watch them watching.