"Looper" poster

"Looper" looks to be a great movie, kind of like "Time Cop" but with a twist. Joseph Gordon Levitt and Bruce Willis are playing the same character which in itself sounds crazy. I've starred at this poster for a good 10 minutes straight an can not seem to work anything out, if you can see anything of significance drop a comment. I'm guessing the "ball" object with wires is going to be the time travelling machine, other than that I've got nothing.