Sleeping Giant

1 ounce light rum
1 ounce dark Jamaican rum
2 ounces lemon juice
1 teaspoon granulated sugar
4 or 5 chunks fresh or canned pineapple

Blend all ingredients with crushed ice until semi-frozen. Pour into tall (15-ounce) glass. Garnish with pineapple wedge speared with a maraschino cherry.