Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Tear Jerker: All-Star Superman
When Jonathan Kent suffers a heart attack, Superman rushes to him so fast that his hair catches on fire from the friction, but he's still too late.
The Unknown Superman's comment to Jonathan Kent, "It all works out in the end." Becomes one retroactively.
Superman: Pa? Why can't I hear his heartbeat?
This simple line from the Prime Superman of DC One Million: "This is an indestructible rose from New Krypton. For him. From all of us. In remembrance of all that we are. And all that we will be."
Superman: I love you, Lois Lane. Until the end of time.
That heartwarming moment with the suicidal kid is also a tear jerker. If you took all eighty years of the character's history and distilled it into a single pure moment containing all his best qualities, that one page would be it. He inspires strength, wisdom, kindness, freedom, value and hope in just a few words. And he saves a life.
In-Universe with Lex Luthor openly weeping at all the pain and anguish that he can hear now that he has Superman's powers.
"It's a cruel joke. The mechanistic clockwork of reality, hinging on a precious, impossible defiance of entropy. On Life. And the clockwork doesn't care. It's like... (growing realization) It's like it's just us, in here together. We're all we've got."
Really needs to be viewed for the full impact. The way Lex's voice just cracks on that last line seals it.
The film actually manages to out-Tearjerk the comic in the ending, thanks to Christopher Drake's amazing score.