(in)famous 'toxic lab' email/memo?

I could've sworn there is an email/memo being passed around this sub a long while back from a fairly famous lab that is kind of unhinged, sent from either a post-doc or a PI, I can't remember.

My lab got a particularly unhinged email being sent to us today by neighbouring PI (cc'd only a selected group of PhDs within the same section). I was jokingly referring to 'that famous Reddit post/copypasta' and realised I couldn't really find the source.