The Fox and the Hound. That one did it for me. Leave it to Disney eh?
I can't pin point which part it was, but basically when the 2 were no longer friends, from then on.
Also, there is a clip from scrubs that hits pretty hard.
Basically, Brendan Fraser's character is a good friend of Dr. Cox. He has Leukemia, and doesn't really take it seriously. Earlier on JD tells Dr. Cox he couldn't save him, but you lead to believe it was a different patient (and blames JD for it). Through the episode he is talking to Ben (Brendan) about going easy on JD saying it isn't his fault. At the end, Dr. Cox thinks he's going to his sons birthday part, but it turns out to be Ben's Funeral.
SheepStar