Rum Corn Balls

2 quarts popped popcorn
2/3 cup granulated sugar
1/2 cup water
2 1/2 tablespoon light corn syrup
1 teaspoon salt
1 tablespoon rum flavor
1/3 teaspoon vinegar

Heat oven to 250 degrees F.

Place popcorn in large 4-inch deep buttered baking pan. Keep warm in the oven.

In a large saucepan, stir sugar, water and corn syrup together until sugar is dissolved. Boil without stirring until mixture reached 250 degrees F on a candy thermometer. Remove from heat and quickly stir in salt, rum flavor and vinegar. Remove popcorn from oven. Pour syrup mixture over popcorn and mix thoroughly. Shape into balls.