The pop-up began when a large glass box appeared in Grand Central's Vanderbilt Hall, containing a replica of the four-seated desk from Lumon's Macrodata Refinement department. Hired actors playing Lumon employees sat at their desks, doing Lumon things (by which I mean, sorting numbers while not having a clue what said numbers mean).

Cast members Adam Scott, Patricia Arquette, Britt Lower, Zach Cherry, and Tramell Tillman brought Lumon Industries to life by performing inside of a glass box, overseen by the series’ director Ben Stiller. Rush hour today should be interesting. #Severance https://t.co/5MhYPxDrhG