Incredible acting!!
Fast-moving, shifting from efforts to save the earth, efforts to save people, reactions of people who don't make the "cut-off requirements", etc.
Poignant - makes you think, would I be able to do that?
Heart-wrenching - impending death makes forgiveness a little easier
Examples of total 100% unselfishness
Examples of calm acceptance in desperate times
Reminds you that everyday people, people you ignore or look down upon could actually be beautiful heroes in disguise! So we should treat people as if they were beautiful anyway!
Sorry if there are any spoilers...