Smartphone addiction is an epidemic. At the most extreme, we have people falling into ditches, tripping up, or getting into all sorts of painful or at least embarrassing situations due to keeping their eyes glued to their screens. But even "regular" users will at the very least experience discomfort from prolonged use and poor posture, especially on the neck. Some call this "text neck", like stiff neck, and Yahoo! Japan happens to have the perfect 360-degree exercise video to fix that and have you laughing your guts out while you're at it.