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Eyewitnesses of ball lightnings report bright glowing spherical balls with diameters under 1 meter. Ball lightnings occur during thunder storms and does not last long, typically less than a few seconds. They are usually orange or red, opaque, self-illuminating, and move on straight or irregular ways. They are often observed inside buildings, mainly without damages, but rarely damages or injuries are reported. Eyewitness accounts are rare, and therefore of great importance for scientists. In such cases direct contact should be made with email@example.com or firstname.lastname@example.org. More information about ball lightnings can be found under http://kugelblitz.uni-salzburg.ac.at/.