I've seen one of these too a few years back. I'm waaay into astronomy but, in addition to being very exciting to see, it was still a bit unsettling because you

I've seen one of these too a few years back. I'm waaay into astronomy but, in addition to being very exciting to see, it was still a bit unsettling because you have no immediate way of gauging how large the thing is, whether it might flatten a city nearby, or be 'the big one' (super slim chance, but tell that to your adrenaline).