Stories like these still exist all over the world. It's an old miracle - well known since the middle age when the people were untaught. Such phenomenons gave the church the might to control the people, to make them believing to their own imagination of God!

In reality those phenomenons are created by some physical and chemical effects which are well known by scientists. You can find many discriptions about that in scientific literature.

Another point is: True Believers are knowing that God doesn't need to present you any argument for his existence! Don't search for God's signs anywhere outside! You'll find God deep inside your own hearts! Trust into the power of Creation!!!

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Greetings from Frankfurt (Germany),
Sheriff ;-)