It is one of the paranormal phenomena that scare people the most. These are giant spheres of fire that travel the sky just like comets. They even appear around doors and windows and on planes zigzagging between people and then back into space.
In general they have a rounded shape, which unlike the ray that is discharged quickly, is persistent. You can move slow, fast or stay motionless. It can emit sibilant sounds, crackling or without noise.
Some attribute them to UFOs since they are unidentified flying objects. According to Edward Argyll, a Canadian scientist, he relates it to persistent images of the retina. He explains that it is caused by the dazzling light of a lightning bolt which remains imprinted on the retina of the eye for quite some time.
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