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If their gravity is significant enough, then it is incorrect to describe that they splash into the Atlantic - it's the Atlantic that splashes into them.
I'd prefer solutions that do not destroy the Earth :-)
Two giant golden balls, dropped somewhere bellow the geosynchronous orbit might do the trick of a little orbiting around each other and then splashing into the ocean, one after another.
That might cause some damage, but the Earth would survive as a planet. Rather costly and not environment friendly solution.