Superman: Birthright/Tear Jerker

Tearjerker:
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 * Early in Superman: Birthright, Clark explains that the reason he is a vegetarian and that he follows Thou Shall Not Kill is that he can see the aura around all living things, and that he never wants to see it disappear. When his friend Kobe is stabbed, Clark makes quick work of the terrorists, then picks Kobe up and urges him to hold on while he takes him to the hospital. We are treated to Clark's POV, where everything is black and grey, except for Kobe, who is surrounded by an absolutely beautiful, rainbow glow. Then the glow fades... and disappears.
 * The  reveal that   witnessed the unclear image of a man bearing an "S" shield telling them:


 * There's also the fact that Superman
 * Near the beginning when it becomes increasingly obvious to the Kents that Clark isn't human, John Kent takes a stroll down memory lane, that ends at Clark's spaceship. Then he snaps, and starts wailing on it with crowbar furious at the permanent reminder that his son is so different from him. It's just so sad and disturbing to see a loving father like Pa Kent lashing out like that.