Pour 3/4 shot of Disaronno into shot glass, Follow with 1/4 shot of Absolut Citron. Place lemon slice over shot glass. Spread a layer of sugar over lemon. Drench lemon with Bicardi 151. Light sugar with flame. Let Burn till flame starts to lessen. Blow out flame. Squeeze lemon and sugar into shot glass. ENJOY !! The best Flamming Lemon Drop drink you've ever drank!