Watched this for the first time a few hours ago. What a fantastic film!
I had the biggest grin on my face from the first to the last frame; John Goodman and Cathy Moriarty, as you guys have already said, are wonderful.
I have to say that I absolutely didn't get the reference to Vietnam in the ending, even if it's quite evident. I guess it's just something that - as an European - it's not ingrained enough in my culture as it is in yours for obvious reasons, so I didn't connect. Or maybe I'm just slow, who knows?
Still, that reading - while it adds a hell of a lot of layers to an already exceptional film - really bummed me out. Keep your eyes open, even through the scary parts...Indeed.
Anyway, so many gems in this one. One small exchange between Mant and the dentist cracked me up pretty hard:
"I got your x-rays back, Bill...I don't suppose it makes much difference to you now, but you didn't have a single cavity!"
in a perfectly deadpan tone "Swell."
Once again, fantastic movie.