What I really got off on was..
the conversation between Kirk and Spock as Kirk was dying. Kirk tells him that using Khan's people against him was something he would have done, and we know that it IS something Prime Kirk did and this is what Prime Spock revealed to NuSpock in answer we never see. And then Kirk tells Spock that dying from radiation to save the ship is what Spock would have done in his place and of course we know how true that is. Even the first time I saw the movie I was a wowed by this two sides of the same coin presentation of Kirk and Spock but I let the Khaaaaan distract me from it. This time it felt right, the reaction of a man whose been hounded and driven and lost his friend at the end of a long hell that he didn't know if he would survive. And as we know he's already more on edge than Prime Spock will ever be because he's lost his planet.
Anyway I don't completely get how it happened but it went from face palm of the century to touching tribute to the perfectly balanced duo that is Kirk and Spock