A nice metaphor in a way...SPOILERS
I don't know if creators are aware or was it their intention from the get go (or they just aimed to create a nice criminal/thriller), but they created a perfect metaphor of how one's spirit or soul could be corrupted beyond recognition while pursuing material things (in this movie - money/wealth). Just a couple of observations:
- The beginning and the end - Craig holds his child (a pure being if you wish), who is happily laughing at his dad in the beginning (as it is still Craig) and cries from the mere sight of him in the end (as it is a shadow of what his dad was). Even his wife looks at him as if thinking "That isn't my husband."
- The scene where Craig puts the money after killing his old friend with the slide show on the wall behind his back. On the slides he is still Craig - a normal human being. And at the same time we are shown what that human being has turned into - a monster (even sort of physically via mutilation and a beating). He is changed for the rest of his life. Craig is spiritually dead.
- Also the odd rich pair could be considered as devil and god or something. You know doing the usual devil/god thing... fighting for the human soul, looking how low can it fall or untempted at all.
Yeah, of course I get it that child could be stressed from waking up and wife is just in shock, and the rich couple could be just a pair of shmucks, but bear with me here :) Riches are obtained through myriad of skeletons in the closet (the pair obviously has their own and now Craig obtained his first one).
All in all a decent flick. Reminds me of Divide a bit.