I persoally witnessed ball lightning. At the time, myself nor my family members that were with me knew it was that special. I mean, not that we had witnessed this before or since, but we had no idea that this was even disputed or had a name.

This tennis ball sized ball of lightning came in the house during a storm through our kitchen back door that stood open. It very slowly swerved acoross the floor at a few centimeters height. It was so slow you could have caught it, for which admittedly I felt the urge. We just stood around an watched it. Then it made it's way to the living room, slowly but surely making it's way towards the television (which was not turned on). When it got to about 2 or 3 meters from the set, it made a curved leap, sort of like a logarithmic curve, right to the center of the CRT. This took out the electricity not just in our house, but apparenrly in several houses down our street.

This must have been sometime late 70's or early 80's. If we had known how rare this was, I'm sure we would have made some sort of report or note. I only found out many years later people even doubted this phenomenon's existence.