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Tear Jerker: BAMBI
The death of Bambi's mother. It traumatized a lot of little kids that saw that movie. Steven Spielberg even recalled in his childhood waking up in the middle of the night and going to his parents' room to check if they were both still alive.
In Bambi 2, Bambi's dream where he thought he saw his mother, ran up to nuzzle her, only to wake up and realize that he was nuzzling a rock.
After being told to leave with a surrogate mother, a heartbroken Bambi argues with his father for seemingly rejecting him, basically telling him he wishes he was dead. As he prepares to leave with the mother deer later however, he turns back and nussles his father one last time. The Great Prince remains still, but his despondent expression says it all.