The fruit should be firm and fresh to insure there is enough oil present in the skin. To flame the oil, hold a lit match in one hand, and pick up the twist in the other very carefully like holding an egg shell, if you squeeze the twist prematurely the oil will be expelled. Hold the twist by the side not the ends, between thumb and forefinger, skin side down, about four inches above the drink. Don't squeeze or you'll lose all the oil before you flame. Hold the match between the drink and the twist, closer to the twist. Snap the twist sharply, propelling the oil through the lit match and onto the surface of the drink. (Be sure to hold twist far enough from the drink to avoid getting a smoky film on the glass.)