"Don't be snarky."

"Please don't post shallow dismissals. A good critical comment teaches us something."

https://news.ycombinator.com/newsguidelines.html

How is "thing happened to me, so I searched for more info, here's an article I found" a frequency illusion?

No it's just the grandgrandparent is very close to something you see on HN a lot where someone says "this just happened and now I'm seeing a post about it!"

The grandparent probably just misread is all.

Well they are the ones who posted this thread to begin with so I don't think they're experiencing that :)

Ah, ok, yes I missed that.