I have nothing but love for the idea that Crowley and Aziraphale's tiny, half-a-miracle attempt resulting in an off-the-scales powerful miracle is because they are a quite literal power couple and neither of them knows it. I also love the idea that the Metatron comes down to personally separate them when he realizes how powerful they are together and how dangerous they would be if they ever realized.

But a part of me clings to the headcanon that their attempt at a tiny miracle results in a colossal miracle instead because they are both cartoonishly bad at not being dramatic when they're together.