Bizarre. I also saw this. The thread went from nothing to [flagged][dead] over the course of about a minute without going through an intermediary [flagged] phase. Fortunately, it's vouched back to life for the time being.
Yesterday, I posted an "Ask HN" on the same topic: https://news.ycombinator.com/item?id=42892245
I wonder if there's some sort of coordinated flagging of Musk-related topics going on, especially given Musk's ongoing (and possibly illegal) government interference. The fact that the flags seem to come so rapidly (enough to mark [dead] within ~30s) is suspicious to me. Can dang comment on this?