I have a question, too. ****SPOILERS*****

There was a point where two guys were dragging a corpse out of the house and mention the stench and all. What was that? A daydream, since none of the bodies were actually removed?

And that ending is unclear. Was she finally free like Norman Bates was at the end of "Psycho IV"? Or was she trying to slip away and continue her killing spree and not get caught? Which makes me think: OFFICE KILLER does seem like a "Psycho" copycat movie, except she doesn't get caught.