Place first three ingredients neat in an old-fashioned glass. Gently spoon 1 teaspoon of 151 on top of the liquid in the glass and set fire to it, preferably with a match (the fumes from a butane lighter will spoil the aroma). Let it burn for about 5-10 seconds and then snuff the flames (a bar coaster works nicely for this). Take the first sip immediately to the get the full effect of the residual half-burned rum fumes; don't burn your lip on the glass. Enjoy.