Personally, I avoid deus ex machina like the plague - if you have to use one, it means you failed to set up the universe and the plot properly. It's like a whodunnit where there's no actual way for the reader to identify the perpetrator before the climactic reveal: there's no sense of closure for the reader.
First of all, let me say, 1:15 in the morning, for 20,000 people to still be here, I wasn't the winner, tennis was. That's awesome. I don't know if I've ever felt so good here before.