Diamondback Rattlesnake

Layer in order (Kahlua on the bottom) in a shot glass. Bradd explains: This drink is very similar to the Rattlesnake number 2 listed in the shooters guide. However, some bartenders in Louisville, KY, used to float a small amount (1 - 1.5 teaspoons) of Bacardi 151 on top; hence the "Diamondback" added onto the name.