There is not a lot of good to say about this movie. The acting - all of it - is dreadful from Fat to Scott to the Nazi character. Moreso that anything the plot is a blantant rip-off of "The Matrix" and "Crouching Tiger, Hidden Dragon"- two movies that are much better than this monstrosity. The idea of a prodigal hero is taken from both of the movies, and Fat is pretty much the same type of character as he was in "Crouching Tiger" but with a worse script. The rip off from the Matrix is made most apparent in the "philosophical" discussions between the two main characters, Fat and Scott: "You're saying the rules of gravity don't apply." => no i am not quoting "The Matrix," this is a line from "BM." The action scenes are a mix of the two movies, as well, with the idea of being weightless from "Crouching TIger" and 'bullet-time' from the Matrix. As I searched I was unable to find any original idea in the movie, but I was unable to find one.
Ultimately, the only redeeming qualities of the movie are the screen presences of the ever-smirking Sean William Scott and Chow-Yun Fat, who clearly struggles for command of the English language.
Don't waste your time with this movie; instead watch the award winning movies, "Crouching Tiger, Hidden Dragon" and "THe Matrix" where the material is actually original and well-used.