I actually had a pit boss sweating my heads up action at a Double Deck S17 game, when with about a +3 count and a $200 bet out I got A8 vs 6.
Following conversation occurred:
cc0:"Now this is an interesting hand. What does the 'book' say to do?"
pit: "I would stand"
cc0: "that sounds like basic strategy, but I have been running real good, I'm up about $1000."
pit: "yes, I've been watching, you have had a good run"
cc0; "go big or go home.
It's time to gambooooooowl!!!!! I double down."
pit: "it's your money, but I would still say stand"
cc0 (after winning hand): "wow, that was some good luck"
pit: "yeah, if a duece had come up, I would suspect something"
PS> for DD s17: 7,7 vs 8 split is basic strategy, although it is another move that you should yell
"It's time to gambooooooowl!!!!!" when you do it.