Dental records *spoilers*
I was surprised at one loose thread in the plot of this otherwise incredible movie. Remember the scene where Charley did a B&E on the dentist's office and put his wife's dental records in his own folder, so that everyone would think the body found in the first explosion (Nadine's) was his? Obviously this didn't work, as both the mob and the law were soon busting down his trailer door looking for him.
At the end of the movie, when Charley blew up the car with his dead partner's body in it, attempting the same identity switch, why didn't he go back to the dentist's and put the young partner's dental records in his folder? It would've made a great punchline!
They even went to the trouble of setting it up early in the movie, when the young guy had a toothache, and they made a point of telling us he'd gone to the same dentist as Charley and Nadine. It's like they set the gag up and forgot to give us the payoff.