I remember that when I was a child
I was crying with Forrest Gump at the end of the movie when he waits the bus with his son.Also I remember that in Braveheart had two moments that were heartbreaking.The one at the begining when the little girl cuts a flower and gives it to William Wallace, and at the end of course where they torture him and he sees at the crowd his dead wife.It had great music in this part.
Now that I refered to Mel Gibson,in lethal weapon 3 I think where his partner kills the friend of his son and Mel goes to his boat and finds him drunk and they start saying something about friendship.
I think that the last scene of E.T was voted the most heartbreaking moment of all time.