Just a Cloud
Take a look at this. It may appear to be unusual, but it isn’t always so. It could just be an odd-looking cloud, and the internet will quickly educate you on that. Consider this cloud, for example. It appears to be unique.
But it’s just a lenticular cloud, as far as we can tell. We aren’t meteorologists, so we have no idea what that phrase means. However, because lenticular clouds are relatively common compared to other mysterious phenomena across the world, we know they’re probably observed regularly.