Post Chosen Time Loop Rescue

[ladypeyton.livejournal.com]

There's a fic set in Chosen or post Chosen where Buffy makes a wish (or somehow else instigates a rescue operation) where Buffy runs back into the high school to get Spike out and fails, but somehow triggers a time loop where she keeps trying different ways to get him safely out of the crater until she finally succeeds.

I remember in one of the attempts she ends up crushed and asphyxiating in the rubble when the school collapses but when the loop reasserts itself she remembers to choose a different path out of the school.

That's all I can remember.

Help?