Instructions
Pour vodka into the shot glass. Sprinkle the sugar over the lemon slice. Put the lemon slice on a heatproof dish and slowly pour Grand Marnier over it. Light the Grand Marnier on fire and let burn 10-15 seconds. You want the sugar to brown a bit on top of the lemon. Use another dish to put out the flames. Do the shot and then suck on the lemon slice coated with caramelized sugar.