This happened at the Nugget in the summer of 2008, and I still remember the event quite well because at the time it was very upsetting. I was playing their SD $25 game heads-up. I was getting 6 rounds per shuffle. On one hand I had a 3-unit bet out (my max on SD is 4 units). I was dealt a soft 17 vs. dealer 9. I hit and got a face for a hard 17 (ugh!). The dealer flips a 4, then deals himself an Ace, then a 2, and says "Seventeen, push." As he is scooping the cards I said "Wait, you only had sixteen." He then spreads the cards, re-tallys, and agrees with me.
He is about to deal himself the next card, lifting up the upper right (our left) corner enough so that I can clearly identify it, the 9 of clubs. However, he inexplicably pauses and says "I need to call the pit boss over." I thought it was kind of strange but did not balk. She took a minute to make her way to our table, he explained the situation, and she responded "Well go ahead, take the next card."
I was all set for a 3 unit win when he pulled the next card, the 5 of diamonds! Now, I can see mistaking some pairs of cards for the other (eg, A and 4, 8 and 9, 6 and 8, etc), but never a 5 and a 9! Especially if they're of different colored suits! I also try to observe the dealer's hands very closely in pitch games looking for flashers. He then says with a grin "I'm sorry, my friend, you should have taken the push." I was so mad I really wanted to jump right across the table . . . I couldn't complain, either . . . what could I have said, "He exposed enough of the next card for me to know that he would have busted?"
Needless to say, that was the last hand I ever played against him. He was still at the Nugget in March. There have been times when things have been going so badly I was all but convinced that I was cheated, but this was a bona fide, unequivocal fleecing, if only for one hand.