If you get the inlarged version of the picture and look closley at the wing, you will see that the.... o s**t i've totaly forgoten what they are called, you know the things you use to chage the direction of the aircraft. Anyway they are both pretty much flush with the wing. On such a sharp turn one side would be way down, while the other would be high up. Do you know what i mean? Otherwise how would the aircraft do such a sharp turn?
Think about it.
It's common sense realy. I think they might be called Airolons or something.
What do you think about this therory?