Reuters reports the case of a man who lowered himself into a lion's cage while exclaiming "God will save me if he exists" was, obviously, mauled to death by the lions.

If he exists?

While instances of stupidity by human beings are around us every day, it is difficult to find one quite as stupid as this.   I mean to say, why double dare God in such a no win proposition?   If God exists and he saves you, now you now there is a God but he's going to be mad at you for having challenged him.   If he exists and doesn't save you, you still know there is a God but now you're dead and he's going to be mad at you.   If God doesn't exist, then you're just going to be dead.   There's no good side to this.

In the words of Edgar Allen Poe, never bet the devil your head!