Get a shooter glass big enough to fill with 3 shots worth of liquor. Pour in 1 shot of Butterscotch Schnapps. Then over the back of a spoon, slowly pour in 1 shot of Irish Cream. Then again over the back of a spoon, slowly pour in 1 shot of Irish Whiskey. If you did it right you'll have the 3 liquors separated in the glass - now slam it back and enjoy!