Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: A Charlie Brown Christmas
The scene where the kids verbally tear Charlie Brown to bits for choosing the wrong tree, before walking away, laughing hysterically.
Then watching Charlie Brown walk away, completely unfazed by their mockery for once in his life, going home fully prepared to decorate the tree... and immediately "killing" it. The sad frustration in his voice is heart-rending.