Using the jigger, measure and pour light rum, dark rum, orange curaçao, orgeat syrup, lime juice, pineapple juice, and orange juice into the blender.
Blend the mixture on high speed until smooth and frothy.
Pour the blended mixture into a hurricane glass. Slowly pour grenadine over the top to create a layered effect. Garnish with a pineapple slice and a cherry.
Notes
For a stronger flavor, you can increase the amount of dark rum.