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rim a tempered glass irish coffee glass with juice from a lime wedge. coat with sugar.
combine rum and orange liqueur in glass.
set the contents of the glass on fire. (light the lighter first outside of the glass, to keep lighter fluid out of the drink)
tilt the glass a bit so the sugar around the rim carmelizes a bit.
put out the flame by covering the glass with a non-plastic plate.
add heavy cream to shaker with a few drops of vanilla extract. shake to add a bit of air to it, but it does not need to be fully whipped.
add 1.5 oz of coffee liqueur to the glass.
pour in hot coffee almost to the top of the glass, below the sugar rim.
top off with the aerated cream by pouring gently over the back of a spoon.
grate fresh nutmeg on top.