after watching the video, i think that the most logical reason my ezio died is of a heart attack. But when you look closely, the man grabs ezios hand. Correct me if im wrong, but it looks like there is a hidden blade in the mans wrist. i think that he poisoned him with the hidden blade when he touched his hand. Then when ezio turns around and looks at the man, the body language seems like the man was saying something like, "yes. i just poisoned you" what do you think??