It's Very Clearly Stated In The Film:

I Feel Very Comfortable Shooting Music, And I Think You Can See That.

But The Process Of Making A Film Is Not Glamorous. Certainly Not My Films.

The Sas Is The Most Elite Of The Special Forces In The World. They Are Not People Who Go Out And Advertise; They Keep It Inside. They Don't Want Anybody To Know About Them.

When Ray Charles Is Concentrating He's Like A Piece Of Granite, Nothing Twitches, Nothing, ... He Sat For 25 Minutes Solid Like That, Like A Stone, And I Thought, 'oh My God, If He Doesn't Like It I'm Dead.' ... And Then Finally, After 25 Minutes He Started To Talk Back To The Screen. I Heard Him Say 'that's Right. That's The Truth.' .

I'm Not In Front Of The Camera, They Are. I Encourage Them; I Build Up As Much Of Their Confidence And Ego As Possible. They've Got To Take Control; I Can't Act It Out.