just don't do that to yourself

I wouldn't recommend seeing Once if you have already seen Walk Hard. The Dewey Cox Story. Both movies tell the story of an up and coming musician. But where Once takes itself seriously, Walk Hard makes glorious fun of the entire genre.

If you've seen a hard to impress recording staff be turned around by Dewey Cox's unexpected talent, when the same thing happens to the guy in Once all you can do is laugh. And that is kind of unfortunate.