Years ago, when the YF-22 was being tested, I read a Lockheed-Martin article describing a test pilot's experience when rolling the plane at extreme alpha and low airspeed. The pilots were tempted to exit the maneuver prematurely, thinking that the plane was not responding correctly. It looked to them like they were way off heading during the roll. (Remember, no one had rolled this kind of airplane at these airspeeds and angles of attack before.) The quote that stuck in my mind was "The airplane rolls around the velocity vector". I've created two brief QuickTime movies to illustrate the phenomenon.

In the first movie, the airplane is in normal cruise, and the velocity vector is in line with the fuselage, as we'd expect, and it's obvious that the plane "rolls around the velocity vector".
http://homepage.mac.com/mikejames/rc...alpha_roll.mov

In the second movie, the airplane is in level flight, but at a high angle of attack. Now, when the airplane rolls around the velocity vector, you'll notice that the nose deviates to nearly 90 degrees off heading, although this actually correct for the configuration, as Ben illustrated.
http://homepage.mac.com/mikejames/rc...alpha_roll.mov

Both these movies, and some others, are on my "Movies" page, at http://homepage.mac.com/mikejames/rc.../rcmovies.html