This woman's job is to suck up the balls in this adult ball pit park, a super important job that can come with some very pleasant surprises. Because inside the Upside Down Immersive Museum in Amsterdam, there's this enormous ball pit that must be cleaned at least once a month. Employees use machines to suck all the balls into a disinfectant chamber, and while the balls are left in bags to dry, they clean the bottom of the pit, where they find various valuable objects that people drop in.