It is written that thou shall not tempt the LORD thy God.
Yep! Exactly. It's one thing for the Lord's disciples to be spared from harm accidentally incurred or done out of malice to them from an enemy of Christ and a whole 'nuther thing to "test" God to somehow prove ones' faith. God doesn't need the showmanship and those that perform such acts are doing so for the praise of men and will NOT please God. He may even let them suffer for their stupidity.