Dimension Films have begun unrolling their on-air campaign for Piranha 3D, their remake from Alex Aja swimming into theaters on August 20. Today we got our hands on the first TV Spot in HD entitled “Pack”, beware of spoilers (why must they do that?) The film begins after a sudden underwater tremor sets free scores of the prehistoric man-eating fish. An unlikely group of strangers must band together to stop themselves from becoming fish food for the area’s new razor-toothed residents.