Alex: Dad, why are you acting like this? Is this about Walt dying?
Phil: No. It's about what he didn't do when he was alive, have a special bond with his daughter. I don't want to be that kind of dad. I want to be Eugene Cernan.
Alex: Who's Eugene Cernan?
Phil: Apollo 17 astronaut, last man on the moon, coolest dad of all time. When he was leaving the moon, he reached down and wrote his daughter's initials into the lunar surface. Since there's no atmosphere-
Alex: There'll be there forever. Wow. So every time she looks in the sky, she knows there's a message just for her.
Phil: Exactly. That's why dads everywhere hate Eugene Cernan.