The Pandorica Opens

I'm not sure I can comment coherently on this beyond "Oh. My. Freaking. God!" In fact, I'm starting to appreciate what Terry Pratchett said in SFX about overuse of the word "awesome" - I thought I was using it carefully when I described past episodes, but now I'm in the position of having to say "That was awesomely awesome!"
( spoilers (and further incoherence) ahead )