I really like the V.O. dialogue. I had to look up pendejo to understand that one part. I don't understand why Gaspar says "why?" after the man says his name.
Is Gaspar Jimenez a man? It is a weird image of him with legs around the man's chest.. stomach may have made sense, but chest is almost slapstick, Jimenez must be an acrobat! I don't know much about spaghetti westerns, so I can't comment on that part.
I don't get an anti-smoking feeling from it, more of a pro-smoking feeling from the last line, like it's cool to die with an unlit cig in your mouth. It would depend on how the line is read I guess. The writing sounds really good, poetic, though I'm not much into poetry myself.