Many yrs ago I had a 3way hand where I had nut flush vs. TWO straight flushes. It was wild. The key card landed on the river...
I also once had a str flush vs a nut flush.
Both hands were on PS. I haven't had anything like that in more than 10 yrs.
And I once folded a set on the turn vs. two other guys with 3 hearts on the board. Then on the river, I would have made a quad. Just when I was lamenting the fold, it turns out one of the two had flopped a str flush and the other one flopped a flush... So I saved my stack.