A grounded iceberg experiences ocean water pushing at it in one direction and the seafloor pushing in another—a ___ that makes it easy for limbs to break off with a splash that can rock boats or flood coasts. The iceberg might even do an entire somersault in the water. Across the world, from the Canadian Arctic to Patagonia in Argentina, that shedding is both a tourist attraction and an issue of concern. The larger the iceberg, the larger the waves it causes if it breaks apart.