STRANGER THINGS: THE FIRST SHADOW is known for its spellbinding stagecraft, so it's only fitting that Swanson would use his penultimate episode to further highlight the show's backstage crew. The production's head of props Reed Neal shows off Bob Newby's famous AV cart and talks "exploding rat tanks." We also meet pyro technician sub Staci Jo Johnston, head carpenter Zachary Feivou, deck carpenter Hunter Keene and hi…