People might slag Sylvester Stallone for his slurred speech and his knuckle-headedness, but the truth is that he's an extremely intelligent writer and filmmaker. In this documentary that was commissioned for the 25th anniversary of Rocky, Stallone gives a heartfelt retelling of how he came upon the story. 

He talks about being totally broke, what made him write about a down-and-out boxer and what into making the first Rocky film. You can see how articulate and passionate he is and it's really inspiring. Check it out.