I was at a single deck game. I had two friends talking and having fun next to me. When the count went high I slowly pushed my bets up. The dealer quietly called them out. I knew I was only going to play a 20 minute game. So I pushed it to a little more. Half way through the dealer would see me pushing large bets out and then go to shuffle early. What messed with them was they had a lazy one pass shuffle and pushed the high cards to the front of the deck. So when I left the large bets out for the start of the deck they were thrown off and started shuffling less.