Dick Van Dyke Cocktail
Pour the half shot of Creme de cassis into the shot glass.
Mix the Triple Sec and Lime Juice in a shaker and carefully layer on top of the Creme de cassis.
Lastly, carefully layer the vodka on top.
You will have a 3 layer shot which is sour to start with, then turning sweet with the Cassis, and of course the hit of the vodka.