Summertime, great song. I can play it on my trumpet as well.

"Hmm, must go polish my trumpet, and give it a good blow. It's as dirty as hell and as cold as a winters eve. Oh shit, I just scratched the bell end. Oh look, I've been blowing it for so long some water is dripping out the end..."

Extract from: "A Day in the Life of a Trumpet Player".