How would most places rule on this?

[Mano]

I went to the Rainbow in Wendover the other day and this hand came up. 2-5 spread limit with a kill to 5/10, under the gun makes it 5 to go, MP calls 5 all in, one more caller, I call on the button with A [img]/images/graemlins/heart.gif[/img] 9 [img]/images/graemlins/heart.gif[/img], blinds fold. Flop comes J 9 2 r, checked to me, I bet only UTG calls, turn blanks, I bet UTG folds. Dealer mucks the entire board (mixes it into the muck) and starts pushing me the pot. As soon as I realize what is going on I say "wait, isn't there an all in player?". Dealer calls floor.