Yesterday evening, I saw the most wonderful optical illusion.
There had been rain, the sky was dark and there was a lovely rainbow.
That in itself drew our attention, because for a rainbow you need sunshine, and from our viewpoint there was no sign of sunshine (obviously, it was behind us, on the other side of the house, but largely obscured by cloud anyway.
While gazing in wonder at the rainbow, something amazing happened: balls of fire, like screwed up balls of burning paper, appeared from nowhere, crossing the sky between us and the end of the rainbow. Dozens of them, each one flickering with yellow, orange and gold!
This only lasted for about ten seconds, I guess, and it took me most of that time to work out what was causing this illusion: Birds.
I don't know what sort of birds they were, but the sun's rays catching on their bodies and wings was what created this.
I have never seen anything like it - it was breathtaking!
Used - step-daughter
No idea - anniversary
Grumpy - grandpa