1/3 a fluid ounce or 1 centilitre of Kahlua
1 fluid ounce or 3 centilitres of Sambuca
Splash of Tequila

Layer in the order given above, ignite and suck the mixture up with a straw while on fire. Excellent party shooter. I found this combo down in the Yucatan while on vacation, definitely my favourite. ALWAYS USE CAUTION WITH FIRE.