Let me preface this post by saying that "Kiss Kiss Bang Bang" is definitely on my list of top ten favorite films. One of the reasons for this is because of Robert Downey Jr.'s narration. It's hilarious and kept me completely into the movie even when the movie itself got a little corny. He is witty and sarcastic, and completely breaks the fourth wall as it is if he is right next to you in the theater watching the film with you. But, I digress. I want to know how you can use a witty narrator such as that of Mr. Downey's in the film, in a film completely not geared around comedy, actually not touching comedy at all. Is that too much contrast and will only confuse the audience? Or will it bring a little comic relief? Let me give you an example of some of the wit/sarcasm of his narrator.
"By now, you may wonder how I wound here..or maybe not, maybe you wonder how Silly Putty picks [stuff] up from comic books, point is, I don't see another God [Darn] narrator, so pipe down. How'd I get here? See for yourself."
and
"[Shoot], I skipped something. damnit! The whole robot bit [reference to an earlier scene), I make a big deal, and then I, like, totally forget. [f-word] This is bad narrating. Like my dad telling a joke, "oh, wait! Back up, I forgot to tell you, the cowboy rode a blue horse." [f-word] Anyway I don't even know if you wanna see it now, but here's the f'n robot stuff, for your viewing pleasure. I'm gonna look for something else to f up. Can I say f more?"
and finally,
"Okay, I apologize. That is a terrible scene; it's like why was
that in the movie, gee, you think it'll COME BACK LATER, MAYBE? I hate that, a TV's on, talking about the new power plan, hmm, wonder where the climax will happen; or the shot of the cook in HUNT FOR RED OCTOBER. So anyhow, sorry."
I don't know why but I love the cynicism, sarcasm, and wit about this and I would love to incorporate it into my screenplay because this style of narration seems like things my protagonist would actually say. Only problem would be it would break that whole suspension of disbelief, I think, I don't know. Any ideas? Thanks and sorry for all the quotes, got a little carried away. If you haven't seen the movie, I think you should (I am captain obvious). 
