My Favorite New Drink - pina y guaro

I came back with a bottle of costa rican guaro - they drink it there with fresca.. I got squirt instead...

first you gotta start with a chunk of pina and a margarita glass, the kind with the smaller part at the base of the glass.. put the pineapple into that little alcove and squish it around a bit, getting the juices flowing.. then shake 2 parts squirt/ 1 part rum with ice and pour over the pineapple..

I'm usually a beer person, but this costa rican rum has some tranquilizer like qualities, so I can't vouch for what will happen if you use any other (clear) rum..