D'Onofrio's Accent
Since the geo is not id'd within the context of the story (?) - no reason to guess at a regional dialect. Whatever he's doing doesn't seem to belong in the rural / suburban setting or wherever it was shot in Canada. As the movie went on, kept thinking VD was doing a cross between John Malkovich and Elmer Fudd. But also kept telling myself "no, he wouldn't do that" - but the more VD said "Rabbit" the Fudd/Malkovich take stuck...
D'Onofrio can do anything in any way he wants - one of the most fascinating actors of his generation.