After a double, taking back the extra bet and ending the hand.
In Spanish 21 and Pontoon, after a double that leaves you below 21, you may take back the doubled amount and end the hand by losing the original bet. Rescue when standing is worth less than −1 (losing the original bet). The published Spanish 21 play: rescue a doubled 12 to 16 against a dealer 8 to A, and 17 against an ace. Example: bet 10, double an 11 (20 in total), draw a 4 for 15 against a dealer Q; standing averages −10.8, rescue costs −10.