When Marlene is playing Blackjack on the computer, she hits and says, "busted," meaning that she went over 21. Then she scolds herself, saying that she shouldn't hit on a soft 18. That means she held an ace and some combination that added to 7 (seven, six and ace, five and two, four and three, etc.). True, she shouldn't have hit on an eighteen. But "soft" means her cards could be considered 8 or 18, so she couldn't have busted by taking a card.