[BH14]

SPOILERS:

I think some of you all missed the point... We are seeing the battle of her multiple personalities in her head and what that personalty felt at the particular moment. What you see doesnt necessarily mean it's real. We are seeing whats going on in her head (some of it real and some of it not in the real world).

That car chase never really happened in the real world... She was actually driving the other girl all alone but she flashed in between personalities. For one second, she thinks that she is following a truck and the next, she has become the killer. We are watching whats going on from her current mental state. Sometimes she felt like she was driving the hotrod and saving her friend and then later the truck and being all evil.

When a crazy person starts having a conversation with himself, Im sure that he thinks he is sane and having a real conversation with someone in their head. Thats what we are seeing! We are seeing the movie from the personality even though its not reality. As for the decapatated BJ, I dont think it really ever happened but the Killer personality experienced it in his life.

There is no car chase! No real fight! She really didnt morph into the killer at the end! She wasnt really being chased by a Killer!