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).

Executive producer and director Ben Stiller shared content of the performance art installation to his social media

The Ben Stiller directed television show 'Severance' had an event in New York—and the internet got very, very excited about it.

The popular Apple TV+ series Severance makes its triumphant return on January 17 with its highly anticipated second season. We’ll return to the world of Lumon Industries, innies and outies, waffle parties and scary numbers, catching up with Adam Scott’s Mark Scout after nearly three years.

The second season of Severance debuts Jan. 17 on Apple TV+. Season 2 of Severance will contain 10 episodes. This is one more than Season 1’s count of nine.

The promotional stunt comes ahead of the highly anticipated release of new episodes. Here's how and when to tune in.