Re: 7X13 The Name Of The Doctor(Grading/Discussion)(SPOILERS!)
If Clara hadn't intervened this would have been the Fall of the 11th Doctor. The Silence didn't want the Doctor to live to open the door and let the GH undo all of the Doctor's victories and leave the Universe in ruin. It was better to kill him early than to have his previous battles undone.
No no no.
If the Doctor had fallen here then it would have been a paradox because he would have fallen before he was supposed to have fallen. This is his future where he "fell in battle". The silence might be referring to that event. I don't see the Tardis falling out of the sky as being more significant than his actual death fall in battle.
"It's not that you can see the strings, it's that 40 years later you're still looking at them." - Steven Moffat
"This movie was big. Imagine how big it could have been with me in it?" William Shatner