Case in point... I had a ploppy who risked his last $100 on a hand. He got 7,3 while the dealer had 7. I took a shot that he might be not be the brightest bulb in the casino and asked him if I could double down for him. Surprisingly, he agreed to let me do so. I was giddy from the opportunity to have such a +EV play for me in a high count no less. I was thrilled when I got the face card for 20 thinking ok the dealer mostly likely has 17. To my utter shock, the dealer has a 5 underneath the 7 and pulls the 8 for a push. Talk about a downer!! It's quite rare to have an opportunity that profitable.