I’ve got two:
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The Cat-Call
Not quite the same level as yours, but: once I saw my cousin’s cat meow at its kittens to call them for milk.
On a spur of the moment random impulse, I meowed the same way, inadvertently replicating the mother cat’s meow down to some exact degree of mimicry such that all the cats turned to look at me; the kittens stopping mid-stride to look at me for a source of milk, their confusion expressed in a footfall hesitations of whether to come to me or not.
The mother cat meowed again, and the kittens resume their journey to her, and she threw me an irritated look.
I have not once been able to replicate this. It was just one of those once a million moments where all the odds of the universe stacked up in favor of me, and paid out in the most realistic cat sound known to either man or cat.
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Call to Prayer
This one has more hidden steps: once, when I was a kid, I was bored watching endless TV coverage about the Royal family
It was a show about the latest gossip on Princess Dianna, and there was literally nothing else to watch on another channel. So I did what any well-adjusted kid did, and that night I got down on one knee and prayed for her die. Prayed. I’m not religious nor was I raised religious in any sense.
Anyway, one week later, she popped off. The guilt stayed with me for a while, until I decided that if God’s taking messed up requests, then that’s on him and not me.
Wikipedia has a slightly better video:
https://en.wikipedia.org/wiki/Detention_of_Rümeysa_Öztürk
I have to admit, I was in tears watching this.