I agree Rane99, the scene where Ennis is still far too shy and uncomfortable to even address Jack properly, is really well done, and it would be really nice to think it was ad-libbed. Heath Ledger seems to have been able to become the character of Ennis, it wouldn't surprise me if Ang just let him do whatever to make Ennis become more real....I think this is just one of the many little things that Heath does to create this amazing complex character. Not being able to even ask for a cigarette light seems far too awkward for Ennis. So sweet though.