The UI of comment threads gets a bit messy when they get very long.
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Oh this is a wild one!! Do you know how many levels deep it went?
I believe there was only one thread on the post at the time, so like in the screenshot, it’s likely to be 30ish comments deep.
It was all one person literally seeing if there was a limit to the amount of replies a user could post.
Seems the comment thread on the example post has been removed since I posted it.