The only cool part of that movie was the end with all of the frogs falling from the sky... I didn't understand it, but watching frogs splat was pretty damn entertaining for two minutes.
Its a natural phenomenon: sometimes a tornado or hurricane sweeps through an area, and during that time frogs and other small fauna are picked up and carried away by the winds. Then they sort of just fly around for abit, and when the winds dicipate, and the rains come down, the frogs come down with them.