Yeah that part was sad.
I still can't get over that Clark has a son though! That's what helped me to enjoy the film as much as I did because when I found out Jason was his son I was just completely blown away, never had I expected that. And I can't get over how cute the kid was. My favorite line (other than "I'm always around"), was by Jason. "I want him to. I like him." He was so adorable when he said that.