You stretch your feet towards the wailing green flames and let their warmth soothe your aches away. Perhaps you wriggle your toes, luxuriously. Who could blame you?
The soul pops and flares. What cheery blue sparks! Wait a minute - blue? You snatch up a toasting-fork and fish the soul from the fireplace. It was more valuable than the label had indicated. Back into the bottle with you, soul.