Snake Midget.
Here's the thing, the law of causality is a fundamental law of nature. It simply cannot be broken, if it were broken, nothing would make sense. Let me clarify.
A couple of boys were playing in a public park when suddenly, they spot a huge kangaroo infront of them.
Jack says," Whoah, where did that kangaroo come from?"
Tim replies," Nowhere, it's just here."
It's easy to see the ridiculousness of the statement. Nothing in nature pops out of nothing; everything that comes into being will naturally have a cause. This statement applies to everything in nature, it would really have to in order for us to be able to explain the world we live in. If the rule of causality did not apply to absolutely everything in nature, then surely we would see elephants randomly appearing in our living room.
Here are the premises for the orgin of the universe.
1. Everything that begins to exist has a cause.
2. The universe began to exist.
Thus from 1 and 2. We conclude that the universe must have had a cause.
Why not a natural cause?
Since nothing preceded the Big Bang because the Big Bang was the starting point in time. The only possible cause would be a supernatural cause, one that is unbounded by the limits of space and time. This is what we call God.
Now, the fundamental misconception here is that theists are again using the "GOd of the Gaps" approach. But this is not true. We are not using this approach at all, simply because if the premises are true, and the majority of the scientific world agree upon both these premises, this would directly imply that a supernatural cause is a very plausible explanation, perhaps even the only logical explanation that remains consistent with the laws of nature and with recent scientific revelations such as the Big Bang.