Slice an apple wheel by turning an apple on its side, then cut a 1/4-inch slice through the center. Cut a slit in the apple wheel to allow it to sit on the glass rim.
Mix cinnamon and sugar together. Lightly sprinkle on apple wheel.
Fill a rock glass with ice cubes.
Pour in Fireball, Apple Sour, and Pineapple juice.
Stir gently and garnish with cinnamon apple wheel.
Alternatively, you can chop apples to place inside the cocktail, cinnamon sugar the rim of the glass, or create a spiral out of the apple skins for garnish.