You can actually improvise a lot as a voice actor. It's not that entirely different than shooting a live action movie; the characters mouths are quite easy to manipulate once all the information is built into the computer. So you can improvise a lot and it doesn't matter really how far along they are in the process they can really just make the character say something different.

I think that, honestly, people's censorship issues are personal but I disagree with most of those personal choices that I see others make. You know, I watch television and there's a grotesque amount of violence on almost every show that you would watch that comes on past 8:00 pm. And I think my dirty brand of humor is far less destructive to a child's mentality.

I met Evan Goldberg at bar-mitzvah class. It was called tallis and tefillin.

It's just kind of seemed like a funny way to explore action movies, I guess. I mean, I'm a big fan of them always. It's always people who are very equipped to deal with the situations that they're thrown in. So, the notion just seemed funny, because it's, like, basically stoners are kind of the last guys in the world who are equipped to deal with that. And the humor possibilities just seemed somewhat endless.

Oftentimes what happens actually is people say to me, 'I didn't know if it was you or not, and then I heard you laugh, and then obviously I could tell it was you.'

Those are the movies that we [with Evan Goldberg] always wanted to make. Pulp Fiction, Reservoir Dogs, the kind of movies where violence and comedy and characters kind of work together really well.

Sometimes what you lose in the time it takes to let an actor do something that you don't like as a director, you gain in not shutting them down creatively by telling them their idea sucks.