3/4 oz vodka
1/4 oz absinthe herbal liqueur
1 slice lemon
1 pinch cinnamon
1 pinch sugar

Almost fill a shot glass with vodka, then place a lemon slice across the top of the glass so that it covers half of the diameter. Fill the rest of the shot glass with absinthe, pouring so that is passes through the slice of lemon.

Add sugar and cinnamon (cinnamon is optional) to the lemon and finally, ignite it. When the flame extinguishes itself, take the shot and eat the lemon.