Amazing and rare natural phenomenon.
a Resident of Vienna Austrian named Manuel VI in early June, photographed in the sky unusual clouds, reminiscent of balloons or a kind of cell. They appeared after the storm and looked pretty scary.
Intense mammatus cloud formations over Vienna, Austria yesterday.
Photos by Manuel We. Posted with permission. pic.twitter.com/yxw8BlFURw
These clouds are called videobrasil and are considered a rare natural phenomenon.
At the end of April looks like a cloud could be seen by the inhabitants of the American city of Tulsa, in Eastern Oklahoma.
Even more interesting about the nature