Inception articulate some of the things that have been swirling around his head for the last eight years." DiCaprio and Nolan spent months talking about the screenplay. Nolan took a long time re-writing the script in order "to make sure that the emotional journey of his character was the driving force of the movie." On February 11, 2009, it was announced that Warner Bros. purchased "Inception", a spec script written by Nolan. Principal photography began in Tokyo on June 19, 2009, with the scene where Saito first hires Cobb during a helicopter flight over the city. The production moved to the
Inception stuff of torpid platitudes," online discussion has been much more positive. Heated debate has centered on the ambiguity of the ending, with many critics like Devin Faraci making the case that the film is self-referential and tongue-in-cheek, both a film about film-making and a dream about dreams. Other critics read "Inception" as Christian allegory and focus on the film's use of religious and water symbolism. Yet other critics, such as Kristin Thompson, see less value in the ambiguous ending of the film and more in its structure and novel method of storytelling, highlighting "Inception" as a new form of narrative