For some reason it's not [spoiler]'s actual death that sets me off...
I cry at sad scenes in movies - I don't find anything wrong with that.
Littlefoot's Mother's death is a sad moment for me, and all though it effects me, I don't seem to actualy cry during the actual death itself. There's a scene later on where Littlefoot sees what he thinks is his mother, and it turns out to be just a shadow - for some reason that is what get's me, I'm not sure why, but I just find it a sad scene...