15 ml of Kahlua coffee liqueur (or coffee liqueur)
15 ml of drambuie scotch whisky (or scotch whisky)
Pour both ingredients into shot glass and mix. Sing a verse of La Cucaracha, or sing la-la-la-la-laaa lots. Bonus points if you can sing it in Spanish. Continue until you can no longer sing la-la-la-la-laaaaa.