The director, standing behind the set of shelves, is going to direct you to move objects around, but remember, he's not going to ask you to move objects that he can't see. This introduces a really interesting condition whereby there's a kind of conflict between your perspective and the director's perspective.
El director, de pie detrás de los estantes, ordenará a Uds. mover los objetos, pero recuerden, él no les pedirá  mover objetos que no puede ver. Esto introduce una condición muy interesante que genera  una especie de conflicto entre la perspectiva de Uds. y la perspectiva del director.