I've hit a K-high spade straight-flush playing a table game at a casino, but never hit one in Hold'em. However, I have dealt one and it was very early in my dealing career (and apparently, very early on in a player's playing career).
I was the designated dealer for a home game tournament and the second hand of the night, I flopped

(I forget what pre-flop action was, but it was minimal). After the flop, SB bet, BB raised, two players (including button) called, SB called. The turn was
. SB bet, BB moved all-in, everybody called. The SB had 
, BB had 
, one player had 
(I have no clue why he called), and button had 
for the royal flush. I'll never forget, he never once bet the hand, just called, and took out two players and all but eliminated a third (one of the three players had won first hand, I forget which).
At the time, I didn't know how rare it really was. I've dealt a lot since then and have never dealt another one, never caught one, and I believe I've only seen one hit at one of my tables, but been around a couple times when one hit at another table.
I was the designated dealer for a home game tournament and the second hand of the night, I flopped


(I forget what pre-flop action was, but it was minimal). After the flop, SB bet, BB raised, two players (including button) called, SB called. The turn was
. SB bet, BB moved all-in, everybody called. The SB had 
, BB had 
, one player had 
(I have no clue why he called), and button had 
for the royal flush. I'll never forget, he never once bet the hand, just called, and took out two players and all but eliminated a third (one of the three players had won first hand, I forget which).At the time, I didn't know how rare it really was. I've dealt a lot since then and have never dealt another one, never caught one, and I believe I've only seen one hit at one of my tables, but been around a couple times when one hit at another table.

, flop the flush, and turn the royal. Only after the entire hand is dealt out and I'm scooping the pot does anyone realize that the dealer dealt the entire hand out counterclockwise, so the royal should have belonged to the guy across from me.
on the Hold Em side.



on my SHE side and 
on my HE side. Board ran out 



, and I was betting all the way, so the pot was a good size on the river.