He hugs himself from the floor, prone, and whispers something specific to himself, and then dies. The Doctor seems not so worried though -- "I've got twelve minutes, that's good... You can do loads in twelve minutes. Suck a mint, buy a sledge, have a fast bath!" -- and then flourishes himself back up the stairs, calling after Rory and Amy... But not Amelia, who has been Cracked. So what about Amy? All three of them, now, are anomalies apparently, "hanging on at the eye of the storm," which is just thrilling! Nothing exists, so nothing they do matters, so they're free to save the universe. It's like if the words on the back of the fax somehow got to the person anyway, and changed everything. That is very awesome. While Amy grits her teeth and gets very angry about the thought of the Doctor dying (specifically, note, that "He'll find a way"), Rory very sweetly and reverently covers the dead Doctor up.
Upstairs on the roof, it's morning, which is funny, is it not, since there are no stars, and mornings imply suns, which are another words for stars. (Also, downstairs that goddamn Dalek is still running around and talking all chopped and screwed.) The sun is less like a sun and more like a TARDIS exploding at the end of the universe, keeping everybody warm. Even in her death.
Rory snottily explains that he can also, thanks to being made of plastic, detect a voice in the familiar VWORP VWORP sound of the sun, and the Doctor cranks it for Amy: "I'm sorry, my love. I'm sorry, my love. I'm sorry, my love." River, caught in the center of the explosion: The TARDIS's emergency protocols have sealed off the control room, putting her into a time loop at the heart of the explosion. We jump to the sun, where the TARDIS doors finally open again and again and again, on nothing, and every time she dies, and every time she apologizes to her beloved Doctor...
Until the time that he's standing at the doors, still closed, as she rushes toward them. "Hi honey, I'm home."
It's debonair and sexy and sort of magnificently cocky, this: Like he's finally speaking River's language back to herself. They bounce back down to the Museum rooftop, where there's a quick blue joke about Robot Rory ("I dated a Nestene duplicate once. Swappable head. It did keep things fresh") and another quick joke about his fez, which he has decided like bowties before them are "cool." Bizarrely, he looks incredible in a fez. Maybe he can just do things like this. Amy, chuckling and cute, snatches it off his head just in time for River to take aim and squareness it into oblivion. Normally this sort of thing would get on my nerves (Women: Can't live with 'em, can't save the universe they destroyed without 'em, bitches'll shoot your hat, when they're not telling you to shut up) but there's a relaxedness in all four of them, the actors themselves maybe, that makes it feel like, I don't know. Like we've all been invited to this wonderful, silly party.