This is really strange:
trees do the same thing.
Did you knew about this ?
http://translate.google.com/translate?hl=en&sl=auto&tl=en&u=http%3A%2F%2Fwww.vestinet.rs%2Fzanimljivosti%2Fotkrivena-velika-kristalna-piramida-u-bermudskom-trouglu
