Seen two royals, one at some small tourney early on when a short stack got called by a large stack all in, with AJ of spades, guy flopped flush and 10 on the turn made him a royal. Another time I dealt a royal flush with A K J of clubs on flop, guy had Q of clubs, I turned the 10 of clubs and everyone folded to him cause he was such a tight player, everyone knew he had it lol.

quad aces twice, no straight flushes

first time, flop was AAA
2nd time, running aces holding american airlines.

3rd time, folded 'dinner for 2' preflop, and the flop was 666