Part of the acting gig is when you're let loose some improvs and put stuff into your own words every once in a while. That doesn't get you a writing credit or more money. It just makes it more fun.
Jack BlackI just remember the early days of Tenacious D. There was no talk or thought about doing a TV show or a movie.
Jack BlackWhen I was a kid, I thought I was the strongest man in the world. Then, the fastest runner and then the smartest person in the world. One by one my delusions got shut down. Now I just see myself as the lamest guy in the world.
Jack Black