Cruise lines have spent decades in a slow-motion arms race over who can cram the most stuff onto a floating mini-city, and MSC Cruises has just raised the stakes considerably. Their next move: a swing ride suspended over the open ocean. The company recently revealed plans for MSC World Asia, its upcoming flagship, which will feature an open-air zone called The Harbour. The centerpiece is an attraction called Cliffhanger, billed as Europe’s first over-water swing of its kind, dangling passengers high above the ship’s deck with unobstructed views of the surrounding sea. Whether that sounds thrilling or terrifying probably depends on how you feel about heights, open water, and voluntarily paying to be on a cruise ship in the first place. Videos by VICE The Harbour also promises a ropes course, waterslides, and what MSC is calling the longest dry slide currently at sea. At night, the whole area lights up and flips into an entertainment zone with extended programming.…