A Successful Movie Director's Incredible Side Hustle

Arguably the most successful movie director of all time is also the most successful with his hobby, too

Most people figure Steven Spielberg owns the title “the most successful movie director of all time,” because of the sheer volume of successful movies he’s made over the past half century.

But James Cameron has a legitimate claim to the title: he keeps topping his own position as director of the highest-grossing movie: first Titanic, then the two Avatar m…