They then put forward a case for the Mind Flayer, and a case for Vecna. Is the Mind Flayer the main Stranger Things enemy? As the theory explains, "Dustin is heard saying in S4 that the Upside Down ...

If you’re sitting in the first 10 rows, you’ve got a crane up to look at it.” To create the mind flayer effect, the “First Shadow” team had to do some construction on the theater.

If you're sitting in the first 10 rows, you've got a crane up to look at it." To create the mind flayer effect, the "First Shadow" team had to do some construction on the theater.