ok, the plot holes/gas station scene/dad dying
As it has been stated in numerous threads about this movie, there are plot holes. However, what needs to be noted is again that this movie is from the perspective of a crazy person...If it makes sense to anyone fully then they need to get checked out! Ok now that we've established that, lets move on to the more pressing issue of the gas station scene, as well as the scene where the dad dies, and other scenes in the home.
Gas Station Scene
As far as this scene is concerned, you can look at it one of two ways. Either you can see it for what it is that she's the only one in the gas station the whole time, which is what the video shows. Or, if you're like me and you wanna know why the gas station clerk was talking to some woman and winking at her, then you could say that points of view are switched. Go back and look at Marie's dream sequence in the beginning where she is being chased, which in the end is actually Alex being chased. (This also applies to the dad dying and who witnesses it). For all we know the whole time Marie is actually the old man, and Alex is Marie. Alex is the one who escaped some how from the truck and the clerk noticed her, not Marie as we saw it. But thats just another mind trip. How that fits into the car chase sequence I don't know but it helped me have some resolution to the scene.
Fathers Death/Truck
Ok, so going along with the previous scene discussed above, one could argue that it was in fact Alex who watched her father die, not Marie. At that point in the movie, Alex's where abouts are actually unknown. It has not been visually established where she is at that point in time. The only one who was "awake" was Marie to see it all. One could also argue that the whole time in the home Alex wasn't actually chained up at all. At this point in the movie, most of the movie could be out sequence when you think about it. This could explain how Alex gets the knife, or you could say that Marie really did belive that she wasn't the killer at the time and really did give her the knife but then why didn't Alex just stab her then? And if you notice, Alex doesn't look at Marie directly in the back of the truck ever. Just all around the place. Also, if the scenes are in fact out of sequence then seeing Alex tied up did in fact happen just not when we think they did.
Was Marie Ever Actually A Guest In The House?
Flash back to when Marie first came into the home. She was never invited into the home, she followed Alex in. This begs to question, is she a friend or a stalker? If you are going on the stalker thing, then this could explain the events in the home. She goes upstairs and gets herself settled, then she goes and eats something with Alex, but then imediately goes outside to smoke, which is when she sees Alex showering. This is where you see the switch in Marie. It is implied that there is the attraction from Marie to Alex. Shortly after this, the killer enters the home. Going with the stalker theme, why does the father seem surprised by the old man when in all actuallity it is Marie? Especially if she supposibly has a photo on the mantal? Also, did anyone else notice how Marie's photo is not on the mantal at all? Again makes ya wonder if she was ever actually a guest. (Please keep in mind that this story can't make 100% sense because it is being told by a crazy person to a camera via the beginning of the movie) Continuing on...So going back to the dads death, Marie goes upstairs after seeing the dad die and makes it appear that she was never infact there. Erasing herself completely from the home, so was she ever really there? If we went back to the whole switcharoo of points of view where Marie's point of view is actaully Alex's, then could this actually be Alex hiding in the room that was never actually entered at all by Marie? Or was this Alex's room? (Note that you only see Alex's room when she's tied to the bed) So did Marie just simply clean up where she had been, or was she ever a guest?
Please note that these are just ideas not facts about the movie, and any comments or other theme ideas are welcomed. And please excuse any random thought jumping. If you made it through my novel aobut this movie then congrats!