The one trope in movies that always moves me (to tears in the case of "3:10 to Yuma" (the original)) is the trope wherin the protagonists heroic or fantastical past is revealed to be a lie , usually crushing those that looked to him as a role model and need them the most whilst crippling the protagonist with deep humiliation and self-loathing, only forcing them to transcend and become something greater than the lie in the end through some incredibly selfless and final act.