So she shivers and dithers and he tells her it's all in her mind, and that goes on for awhile, and he's like, "The Angel is gonna come and it's gonna turn this light off, and then there's nothing I can do to stop it," which is really not helping, and "We're both going to die," which is really not helping, and she's like, "Go on without me!" Because she is a brave soul and because she knows, per River's diary, that he's got a lot of things left to deal with, and he explains yet again that time can be rewritten, and it's like we're watching the last three episodes in slow succession, and he goes, "Keep your eyes on it. Don't blink." Which, just say that fifty more times please, even when it doesn't make sense.
Amy's like, "You can't die for me! I'm not that clingy! Go save the people!" and the whole time he's like, "You are not turning to stone!" I mean, they yell about this for a seriously long time, and the music is like CAN YOU BELIEVE THIS SHIT, and he tells her she's "magnificent" and they have a tearful goodbye sort of scene, and then he bites her on the hand, which causes her to jerk back, because... She is not turning to stone, there is no sand in her itchy eyeball, and the whole last scene was just a fantasy, which the Doctor cured by the power of wishing, much like when Amy went into that instant coma and he yelled at her to remember the Alamo or whatever. That maybe faith is the thing that helps you ignore what you think is reality in order to make the jump to something better, perhaps. That good faith is the ability to jump out of bad faith, to keep moving just long enough to save yourself from turning to stone.
"Blimey, your teeth! Have you got space teeth?" Everything has a silver lining. That whole random reiteration of the trip down SPACEWHALE's gullet was worth "space teeth." I give.
Squad's down to four men, torches flickering and dying, gravity globe whatsit also imperiled -- oh, I get it, they're feeding on the power of all the stuff, not just the warp drives -- and they run and they run and they run and get cornered. Byzantium's still too high up and apparently one of the sixteen dead soldiers was carrying the equipment. "There's no way up, no way back, no way out," we're informed, and we discuss how the Doctor always has a plan, and he worries how there's no way out because there's always a way out.
And right before he figures it out, Angel Bob speaks up. "Doctor? Can I speak to the Doctor, please? Your power will not last much longer, and the Angels will be with you shortly. Sorry, sir... There's something the Angels are very keen you should know before the end: I died in fear. You told me my fear would keep me alive but I died afraid, in pain and alone. You made me trust you, and when it mattered, you let me down."