A rare natural phenomenon was observed in Indonesia

An unusual and frightening phenomenon was seen in the sky by the inhabitants of the Indonesian province of Western Nusa Tenggara.
School children playing in the yard started shouting so loudly that a teacher came to them to help. It was he who shot a huge disk on the video, “creeping out” because of thunderclouds.
At first, everyone thought that this was an alien invasion, but, according to the teacher, most likely, this phenomenon is just a rare “round-horizontal rainbow”. Nevertheless, it looks ominous.