Don't bang your head on the wall, you'll end up with a headache. I just hope you won't bang *my* head on the wall once you got the answer...

Ok, more clues... there are 3 words in the movie title. And I think someone's mentioned NYC before? That's where the movie takes place. Lastly, the signs/symbols - those are your biggest hint. Once you find out what they "are" you'll get the answer.