The ending to 'Inception' was easily one of the most talked-about endings in movies of the past decade.

That image of Leonardo DiCaprio spinning the top then looking away to his children as the top keeps spinning left people on the edge of their seats and theorising for years afterwards. However, in a recent enough screening of the movie, Michael Caine laid it out flat for all to see. Namely that whenever Michael Caine's character was on screen, it was reality - meaning, therefore, that the ending was real and not in Leonardo DiCaprio's dreams.

That explanation, however, clearly didn't make it to DiCaprio as a recent interview on 'WTF with Marc Maron' revealed that he still doesn't know what the ending to 'Inception' was about. "I have no idea. You're just focused on your character, man," DiCaprio told Maron.

As DiCaprio tells it, he normally has a much bigger involvement in a story, but with 'Inception' and "when it came to Chris Nolan and his mind and how that was all pieced together, everyone was trying to constantly put that puzzle together."

Ten years on, and people are still arguing over how it ended. Here's the scene, in case you forgot.