Normally, most writers don't say, 'I'm going into a mild...

Normally, most writers don't say, 'I'm going into a mild hypnotic trance.' Typically, they don't know how they do it. Most people, when they have a good experience writing, they're well placed in that state, which is also sometimes called a 'flow state.' If you don't have trouble, you don't have to think about it.