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Tearjerker: Lady and the Tramp
When this troper saw the dogs howling during the dog pound sequence, this troper saw many saddened dogs. I know the main four were just trying to distract the dog pound carriers, but the looks on those sad faces, especially the puppies in their pound cages. It...it was just so sad.
Trusty's Disney Death. Jock whimpering, then when he nudges Trusty and there's no response. That sad, mournful, cry he makes is awful!