quido manages to get a key to fall from heavan. why is this not a miracle?

While Ferruccio attempts to fix the car, Guido happens upon a little farm, where the woman who is to become the love of his life literally falls from the sky into his arms. "Good morning, princess!" he cries, grinning widely.

This isn't a miracle but a stroke of luck. when Guido asks Mary to send him down a lock, he was referring to the Virgin Mary in the Bible, but obviously, there was a Mary in the building who threw down the key, presumably thinking that her husband wanted the key. It is not a miracle as it can be explained through reasoning.