Alternative Character Interpretation: Late in the film, Sam approaches Jack in a restaurant and nearly shoots him dead, but is unable to do so. Opinions vary on whether he did this because he just lost his nerve, whether it was a bit of Pragmatic Villainy on realising that if he shot Jack in such a public place then he'd get arrested long before he could put his plan to assassinate Nixon into action, or whether he decided that for all his misdeeds, Jack hadn't done anything to actually deserve being killed.
Angst? What Angst?: While one could buy that Bonny, Jack and Marie had grown so sick and tired of Sam that they genuinely don't give two shits about hearing that he got himself shot dead while trying to hijack a plane, Marie seems awfully calm considering that she'd almost certainly have found out that her pet dog had been murdered by her ex-husband by that point.
Jerkass Woobie: Sam is a cowardly, jerkish, irresponsible and angry person who blames people for his mistakes and makes life harder for almost everyone he meets. But he's been so beaten down by life and his problems and struggling so hard to keep himself together for so long it's hard not to feel bad for him.
Tear Jerker: An ambitious man with a loving family sees his wife and children disown him, his dreams fall apart and can't escape the feeling that he is being thread upon by an uncaring Government that's so wretched with corruption that it needs to be taken down completely. Even sadder is that it's based on a true story and Sam definitely isn't the only person to feel like this.