I think that's called a moose bridgehead...i hate them. Years ago when almost everyone was playing 14.1 you would see two bridges used a lot. You don't see it done much now because very few play 14.1, a good percentage of players can shoot fair to good from either side, a lot of people do the behind the back thing, and some like me are too lazy to get two bridges to do it with.
On a side note. I would say A. Fisher is one of the best with a bridge. She use to play for hours in practice using the bridge for every shot. That's why most players will do just about anything to not use the bridge. The need to practice...it's still part of the game. Johnnyt