Asides from their choice of making money, this is quite an entertaining film which will leaving you thinking about whether free will is at play or if they are doomed to follow their set path. Before imdb dies I just wanted to copy over an alternative way I found myself thinking about how this film may work:-

At the end, does the message fall off because it always had to fall off (unchangeable predestination)? Or is it because the movie is following a timeline where it falls off, so that is all we're ever going to see?

http://science.howstuffworks.com/innovation/science-questions/quantum-suicide.htm

If you replace the quantum suicide / immortality theory's gun shooting events with this film's picture creations, then this gives you an interesting alternative view on how the film plays out...

Although it, at it's simplest, appears that this film plays out on a fixed time line, with predestination at play, there is nothing we actually see which makes that distinguishable from being shown along the appropriate "many world" path.