A vacation to the Ozarks turns upside-down when bull sharks somehow infiltrate Arkansas' freshwater lakes and wreak havoc on a town's big fireworks festival.A vacation to the Ozarks turns upside-down when bull sharks somehow infiltrate Arkansas' freshwater lakes and wreak havoc on a town's big fireworks festival.A vacation to the Ozarks turns upside-down when bull sharks somehow infiltrate Arkansas' freshwater lakes and wreak havoc on a town's big fireworks festival.