nice model indeed but the position change during the jump-attack animation should be done by the movement script and not the ani itself
Actually it is quite common to let the model change position via animations. For example in gothic they did the very same thing. I think this comes in handy if you are using motion capture data which wouldnt look too awesome with scripted movement.
By the way i am currently implementing such a system so i can use normal collision detection + mocap data for my projects. (Maybe i'll release that to the public so anyone can use it....)
Anyway i am not quite sure if he made this model himself because i am pretty sure he imported it from somewhere because the axes are flipped and the animation has this position change stuff with bones animation. So it might be smart to check on the copyrights before using it in any project.