Hanks did some of the best dramatic work of his career throughout that film, not just the last 10 minutes. The best thing about Tom is that he only brings exactly what the role demands, and nothing more. He doesn't have to turn it up to 11 unless it calls for it. He doesn't have any of those established moves like Pacino's LOUD WIDE-EYES thing he always does, or the squinty head bobble of DeNiro or Jack Nicholson's Jack Nicholsoning his way through all the things, etc. Despite being one of the most charming American actors around, not a hint of that is on display here, as the solid and workmanlike Phillips. I'd say its because of how relatively calm and collected he seems for the majority of the film that gives the final 10 minutes or so its power.