Experimentation is a fundamental element of film production. You're either experimenting (trying something you've never done before) or repeating yourself.
That's a big reason why I don't like the term "experimental film". Many of the artists who are called "experimental" are refining techniques and ideas they've previously used.
Part of the process of film -animation in particular -is figuring out what you're going to do.
This is a little experiment for a project we're working on for the NEH.
It's unlikely the film will have anything like this in it, but the act of putting it together helps figure out what will make the cut and offers ideas that otherwise would've laid dormant.