Eclipse mania gripped North America on Monday as a breathtaking celestial spectacle captivated tens of millions of people, offering a rare blend of scientific interest, commercial opportunity and daytime partying. The Moon's shadow plunged the Pacific coast of Mexico into total darkness at 11:07 am local time (1807 GMT) then swept across the United States at supersonic speed, returning to the ocean over Canada's Atlantic coast just under an hour-and-a-half after landfall.