What Usually Sparks a Barf Draft?

The spark is so random, right? Yes. I think any creative person, it's hard to even remember where the spark came from. The movie will not even be what the spark was potentially. It will be in its essence, but the execution of it, you have no idea. So I just let it go. And I do a lot of maybe free writing. Like intellectually, I can figure this out sometimes. Sometimes I catch myself and I'm way over into the intellect and I force myself back. But often the other thing is to give it to people. To make yourself vulnerable and say, okay, I know this doesn't work. This barf draft is just going on