http://www.youtube.com/watch?v=Jw0rxttZUJ8
and
http://www.youtube.com/watch?v=2vTCjRSaTwM ( with the picture in picture the other way round, slightly more visual )
hmm, im not sure - it was the first time i ever tried this one ( i always film them and watch them back ) but it looked ok so here it is
