For the past few years, ‘human spontaneous combustion’ has been considered as a result of ball lightning in nature. That is to say, it is not out of self-burning but external ignition. People holding this kind of view explain that ball lightning is like a big fire ball moving swiftly in the air, which always horrifies the pedestrians at night.
Ball lightning can go through the gaps between doors and windows and enter houses in residential areas. Its occasional explosion may destroy buildings and lead to death of people and livestock. No obstacles can block its way while it can avoid getting combustible things burnt around.
Usually, the energy released by each explosion of ball lightning equals to that of 10kg TNT. Smells of something burnt, sulphur or ozone can linger after the disappearance of blasted ball lightning.
It is also pointed out by someone that ball lightning is related to UFOs. Some suggest that most UFOs may be ball lightning on account of the mysterious behavior of the latter.
The reason comes from two aspects: ball lightning is as various as UFOs in color, like white, pink, orange, blue and so on; they also share something in common in sound, as ball lightning fizzes and cracks when moving and fades away quietly.
Most UFOs can’t be heard because they are from a great distance, but there are few UFO rumbling or whirring while flying; and some UFOs release a large amount of energy, which is very similar to ball lightning as both of them are able to float in the air with elusive drifting. However, dissenters suggest otherwise that ball lightning always appear in storms with thunder, while most UFOs are spotted during sunny days. Furthermore, the movement of ball lightning overhead totally depends on the airflow, but UFOs seem not always in line with it.
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