Here's my stab at an explanation from Drew for Hit Me should it come back:

Drew: "We're playing a game called Hit Me. [Contestant name], cut these cards, if you would please-- (contestant cuts)-- thank you. George/Rachel/James/Devin/Manuela/Amber will take these cards over to the board, and will draw the top card, which will be the hole card for the house; (dealer) will then draw the next card, and that will be the up card for the house; house hits at 16 and below, and stays on 17 and above. Your job is to get 21, or get as close as you can to 21 without going over. We have 6 grocery items here, and you'll draw your cards from those grocery items. There is one item with a price multiplied by 10, from which you'll get a 10 or a picture card, and one with an exact price, where you'll get an ace (which you can turn into 11); get both of those, and you win the prize right off. All the others are multiplied by various other numbers. You pick a product, and we draw its card and put it on your side of the board. When you've made your hand, you stop, and we reveal the dealer's hand compared to yours. If the dealer gets 21/blackjack, you lose; if the dealer gets closer to 21 than you do, you lose; and if you bust, you lose. However, if you get 21/blackjack, you win; if you get closer to 21 than the dealer without busting, you win; if the dealer busts, you win; and if you tie, you win. So there are three ways to lose and four ways to win. George, tell us about the grocery items, please."