This shot-in-a-beer is kindof like the Mule, Cointreau Kick, or Dr. Pepper. You have to use Guiness and Kahlua, or at least a dark stout beer and coffee liquor. Works best with two pilsner glasses, and two classic glass 2 oz shot glasses. Pour half the can, or 6 oz from draft into each glass, pour out two 2 oz shots, and let them drop the shot glass into their beer glass and chug until it's done.