dealer misread hand, do I say something?

[squallA964]

This situation came up last week player 1-2NL at my local "charity" event. There's a tourney earlier in the night, and then 1-2 starts up about 11 and we play til morning. I play there alot so I know almost everybody, and at the end of the night, it's down to just one table. At this point, some of the dealers play, so there were a few of them at the table. A hand goes all in between two other people, QQ vs. 55. Dealer puts the board down, and Queens hits a 3rd queen on the river....but it was the Q [img]/images/graemlins/heart.gif[/img], which made the pocket fives a four flush. Alot of people were joking around at the table, the woman with pocket queens started celebrating as soon as her queen hit, so the dealer pushed the pot towards QQ.

The guy with the winning hand didnt know he'd won. He didnt even notice he hit a four flush. He starts to get up to leave. The other dealers who were actually playing didnt notice either. So I spoke up and said "Wait a sec, there's a four flush on board." Everyone did a double take, the lady with QQ groaned and laughed at it, and the guy with the four flush sat back down in disbelief. All the dealers repeatedly thanked me for pointing it out.

So....do I have obligation to point out a mistake in a hand I'm not involved in when I'm at the table. Or is it my job to keep my mouth shut, and if nobody notices (including the actual winner), then so be it. I don't know every casino standard, so what should I do in this situation? I can just imagine myself being chewed out by a big time player for costing him money when I wasnt involved in the hand.