How much is that? WTF !?!?!

2/5 at the V. I pick up KdTd on the button and limp in with 2 earlier callers, to be joined by the SB and BB. 5-way unraised action with genial Joseph about to deal the flop and yours truly on the button; what could possibly go wrong?

The flop is Kh Jd 9d giving me top pair and the second nut flush draw, not to mention straight flush and gutshot straight draws.

It's checked around to me and I bet $20. Everyone folds except BB, a local regular who calls and has me covered.

The turn is 6d, giving me the 2nd nut flush. BB checks, I make it $45, BB calls.

The river brings a harmless 5s. BB checks again and I go all-in with my remaining $150.

BB looks at the chips I have just pushed across the line, and then asks Joseph, "How much is that?" As he counts out his chips, I am already mentally stacking the chips in the pot that are soon to be pushed my way.

As soon as BB calls and even before he slides his chips over the line, I immediately expose my hand, not wishing to prolong his agony any further. He looks at my cards and then turns over Ad3d, the nut flush.

I decide not to say anything at the table, get up and leave. 20 minutes later I catch up with BB, who is on a break away from the table. I shake his hand and say, "Nice hand. But when I'm all-in and you've got the nuts, why do you ask How much is that ?"

"I'm sorry, I made a mistake, I shouldn't have," he replied and repeated it again. I know this regular and accepted his apology.