My refrigerator's compressor just happened to turn on when I clicked the link. I was impressed.

It's similar to this image: https://i.imgur.com/Zihujue.jpg Try staring at that for a few seconds.

The best explanation is that it overloads the edge detectors in your brain. There are some other possible explanations here: https://www.reddit.com/r/explainlikeimfive/comments/1sgn7v/e...

Oh ya it does. For me, it's only when the bars get really bunched together... basically I can't stare at it anymore when it gets there.

Or cause a tonic-clonic seizure.

For me it causes faster breathing and faster (perceived?) heart beat..

I'm one of those humans. I helps not to look at the screen just listen and glance at it when you hear the tune.

good god man, my eyes, I can't feel my eyes!

Yes, I am one of those "some humans".