This is an adjunct to my recent post about adherence to the proper strategies.
Quite some time ago, I was playing $1 10/7 Double Bonus at, I think, the Palms. I was dealt Q, QJ10 suited, X. Now, I knew that in 10/7 DB, you break a high pair for QJ10 or KQJ suited. But I had been getting my ass kicked and balked at throwing away a winning hand. So I drew three, and yep, the first two cards out were the AK of that QJ10 suit. $4,000 down the tubes!
I attempted to make myself feel better by telling myself that the RNG was still churning after my initial hand was dealt and had I held the QJ10, the draw would have been totally different. Except...that wasn't true. This particular model of machine, at least, dealt ten cards as soon as you pressed the DEAL button. Five went to the initial hand, and the other five were placed in a queue. So the AK were already sixth and seventh.
In retrospect, I guess I was fortunate. I know a number of players who violated the proper strategies and got lucky, and never followed those strategies again--which ultimately cost them money, of course. One was a woman I called "Ms. Ace-Ten Suited," because she famously always held those cards (which is wrong about 99% of the time). And she hit about five royals doing that, so she drew the gloriously stupid conclusion that her instincts knew better than that silly ol' math stuff the experts proposed. Of course, she eventually went broke.