I re read your post, now I understand what you are asking,
No one who know this game ( double, redouble, pontoon), will double his first 2 cards of less than 7, against dealer's up cards of 8-A. So, he will not put himself in this bad situation. But if he is drunk, or as Wizard put it that some one put a gun in his head, ask him to double his thirst 2 cards 2, 3 , and get a 2 , now he has 7
The chart tell what to do with this situation. You can only, stand, re double or surrender. The correct play is to surrender. ( against dealer's up cards 8- A).
If you don't understand still, then Ask the Wizard.
Thank you for trying to help me, Francisco. I thought I had it down, until you started talking about Pontoon. The games I have played, (not very many yet), are in Indian casinos in California. There you can double, and re-double. After doubling, of course, your options are redouble, stand, or surrender.
Anyway, I think we're on the same page now. I do find this game a lot of fun so far, win or lose. I am not a regular table game player. I'm a video poker player. Spanish 21 seems a lot more fun than regular blackjack. Perhaps I'll tire of it soon. So far, it's new to me, and fun. I don't strive to gamble for fun, but in this case I make an exception.
Don't believe anything until it is officially denied.