The growth pattern isn't unnusual for BC at all. They can take a big variety of forms, depending on where they're growing and how the local environment shapes them. Old BC like this one, probably have been broken and rebroken in their upper regions by storms, and have relied on their lower branches to survive.
Here's a photo of an old one I found that shows similar characteristics:
http://sports.webshots.com/photo/22...101407719tGaKfa