No, it's not a scene from the latest Korean summer blockbuster, "Train to Busan," where the living dead take control of a speeding train.
Instead, these are South Korea's smartphone zombies: distracted walkers wandering the city's sidewalks and wide boulevards, seemingly oblivious to everything except the latest text, alert, or notification on their phone.
And in one of the most wired countries on the planet, where more than 80% of people own a smartphone, you don't have to go far to find them.
