Dat one highly improbable scene
This is the only bit of the film that lost me.
A guy gets shot 2-3 times in the upper body, and drops. He later gets up again and runs. Ok, seems unlikely, but combat experts say that's possible.
But he's then seen being chased by a dozen or so NVA, all hot on his heels, and shooting at him with their AKs. He then drops to his knees, and manages to die slowly and dramatically enough for a full orchestral crescendo, all while under heavy automatic fire, at short range, to his back.