Like another example is say a killer is battled throughout a whole movie, and finally at the end he is put through a wood chipper and mangled into little pieces... all good, the people survive.. You then see them sipping latte's somewhere, relaxing, happy their lives are back to normal, then suddenly the killer comes out from under the table and kills them both... Cut to credits and loud rock music...
So the internet is achatter... Was it a twin? They mentioned in the movie somewhere the killer had a brother... You didn't actually "see" his face as he went in the wood chipper, maybe it was someone else... Maybe it's his ghost.. Maybe they just "dreamed" they threw him in the woodchipper...
No, the movie director just stuck in 2 in-congruent seconds of footage of a man who was already dead, now killing the main characters.... There is no special logic or mystery or puzzle behind it... He just did it because he could.... It actually makes no logical sense, only that it's there to piss common sense people like me off after dedicating 2 hours to a movie, and make conspiracy theorist people with no life spend hours trying to work out the sense of an utterly senseless event...