You back off sharp in a RWD and it will snap back fast, usually too fast, meaning you fishtail and crash.

Best thing to do if you just want to get it back straight is let off, but not so violently.

Keeping your boot right in will keep it oversteering more and more and you will prob just spin and crash no matter how much steering lock you got, just as bad as letting off sharp.

Its all a fine balance, depending what you trying to do and the car itself.