Close to the end when Edward Norton runs up to the front of the empty building and Brad Pitt appears, he tries to break the glass door by pushing a bench into the door, but it doesn't work. He doesn't move the bench and he then shoots at the glass and breaks it. When it shows him walking through the broken door, the bench has disappeared.
In the very last scene, a few frames show a picture of a man's penis, just as he refers to in the movie. It is very obvious, no freeze-framing is necessary.