When you burn a brush pile, always call it a bonfire. It makes it more fun and not a chore.
When you burn a brush pile, dead dry pine branches will go up quickly. And when the fire slows down, the willow and sycamore branches will make dancing shapes of flame (some of which can be captured on your cell phone).
Oh, and when you burn a brush pile, remember to have lots of water handy for putting it out. It's been a dry year.