#5. Scrooge McDuck Did Inception First
Inception was the biggest film release in a long time, and audiences and critics alike gushed over how original it was. It pioneered such innovative story mechanics as dream sharing, thought theft, psychological limbo and escaping the subconscious through specific triggers, or "kicks." Those are, no doubt brilliant devices. Devices that, to a one, can be traced back to Scrooge McDuck.
In a 2002 comic book, eight years before Christopher Nolan's little dream exploration film, Scrooge got his mind hijacked by the Beagle Boys. The Boys were trying out new careers as dream-thieves and went into Scrooge's mind to steal the secret combination of his vault. If this sounds vaguely familiar, it's because that's exactly how Inception opens up, except you have to replace DiCaprio with talking dogs. Which, incidentally, would probably improve every single one of his movies.
After they're inside Scrooge's mind, the Beagle Boys have trouble differentiating dreams from reality -- again, exactly like the characters from Inception, who need special items, or "totems" in order to tell dream from reality.
When Donald Duck enters Scrooge's dream to help, he has to figure out a way to pry the Beagle Boys out of there. In Inception they use "kicks" to make controlled exits, like how the feeling of falling usually snaps you out of the dream. In McDuck's head, they do, well, the exact same thing.
In order to escape danger, Scrooge starts jumping from dream to dream, but like Cillian Murphy's character, he can't remember the last dream once he's in the new one. Donald, however, is the invader (like DiCaprio) so he alone is able to remember the progression.