10 Movie Secrets They'll Never Tell You

6. Is Cobb Dreaming? - Inception

Few films have ended in more agonisingly ambiguous fashion than Christopher Nolan's sci-fi masterpiece Inception, which concludes with Cobb (Leonardo DiCaprio) seemingly being granted passage back to the United States and reunited with his children.

Except, the closing shot of a spinning top not quite toppling over leaves audiences to ponder whether we're witnessing objective reality or one of Cobb's dreams.

Interviewers hassle Nolan for a concrete answer every single time he joins the press circuit to promote a new film, yet he's remained impressively tight-lipped on the matter.

Though Inception star Michael Caine claims that Nolan told him any scene featuring his character - which would include the ending - are reality, Nolan hasn't ever revealed the truth himself.

Rather, Nolan has frequently repeated one simple explanation:

"I think it was [producer and wife Emma Thomas] who sort of pointed out the correct answer, really... The point of the shot is that [DiCaprio's] character doesn't care at that point."

Basically, Cobb has accepted whatever reality he has been presented with, whether "real" in a traditional sense or part of a dream. And given that Nolan has held this line for well over a decade, it's likely all we're ever going to get from him.