Guess the piece.

There's a substantial prize for the first person to tell what this piece of music is from.
Any horn player will recognise it straight away cos its a very famous orchestral excerpt from something coming up soon.

A totally pointless and meaningless pic today. Didn't take anything else, but did want to say how awesome and weird that a guy I subscribe to on here (Backwards with Time) and hasn't posted anything for ages, posted up a couple of blips yesterday. I was so happy. It was like meeting an old friend, yet I've never met him. What a truly unique site this is!
I'm so feelin' the bliplove going on here guys, and it's a beautiful, beautiful thing!