You were under pressure Warb. Then the moment came and your mind focused.
I'm in amatheur theatre and I've seen actors who won't remember their lines, and just be a nervous wreck during reharsals, and then they get on stage and they give their 100%, and it all goes well.
You've probably seen that, when you were at school. There's a test coming up, and you're studying with a classmate. He or she is nervous and keeps repeating "I know nothing. I am scared shitless." Then they go there and get an A.
It's our brains, they work like that when we're scared, we think we can't do something because we're afraid we'll mess up, but then the adrenaline rush comes and we concentrate and BOOM! Now you're reading this in John Madden's voice.

You just want to believe it's a miracle because it's closely related to something religious (choir singing) and I won't take that away from you, but... proof of God? As that song went, that don't impress me much.