Interestingly, given the waffle from Goofus above, Hawking demonstrated that you don't actually need a God to give the Big Bang. For a god to make it happen, it requires cause and effect. Time is a product of the Big Bang therefore nothing could have been contemplated or actioned before it happened.

So much for God.

As Michael is sat up and alert, I'll try and help him with his old chestnut regarding what went bang.

Nothing.

It's a bit like when Jeremy Clarkson was describing the sound of a particular super car engine. He said it sounded like Tom Jones experiencing man love for the first time. I'm sure it didn't and I doubt Tom Jones has been in a position (sorry) to make that sound, but we get an idea of what Clarkson was trying to describe. Ditto Big Bang.