Generally speaking I would say I enjoy the smaller films more because there's a less sense of pressure and often the material is more unusual. But in "Iron Man" it was kind of like both worlds colliding because there was a lot of improvisation, not that we improv-ed in the scenes but to discover the actual scenes themselves.
We've looked at sleep diaries of patients with insomnia, and they'll say that they don't sleep for one or two days. And the body actually has a natural function, after about the third day to start catching up and you get a little bit more sleep the third night. And that's usually what I tell my patients.