I think one of the worst things for writing is thinking too much. Our thinking brain is great for clean up, but it will put up a block whenever we do something out of the norm, unexpected, or that breaks the rules.
Thinking brain will say, no, you can’t do that.
Don’t think of the words you should be using. Don’t think of anything. Connect to the mental movie and write down what you see.
Don’t try to make it happen. Let it happen. It already exists in the future. Let it become what it wants to be.