Life as a House (2001)

Continuity mistake: During the sunscreen scene, Sam has a spot of sunscreen on his left cheek that appears and disappears between shots.

George: You're the most beautiful woman I have ever known.
Robin: What?
George: Not just physically. Even your anger's perfect.

Trivia: When Hayden Christensen was filming the scene in which Sam finds out that George is dying, he improvised punching the wall with his fist. In doing so, he broke his hand. When shooting resumed, the wall was replaced with a prop wall so Hayden wouldn't hurt himself again.

Question: I've seen this movie a couple of times, but I still don't get the deal with the man in the car that Sam goes to at night. What was he going to do?