The Twilight Zone episode "The After Hours" can best explain the lives of mannequins and Innies alike on Severance.
This experiment in work-life balance forces employees to exist in two different realities: their "innie" lives, confined to the blank, windowless walls and (many) hallways of Lumon, and their "outie" ...
Over the course of Severance season 2 episode 9, the audience slowly learns who the show's biggest monster really is thanks ...