With all due respect, Sorrow, after looking at this film I don't see any wacky instant turns whatsoever. In your first HO pass, you came right at the Yak who, after the two of you passed, dove and looped up at you. Such a move seems entirely reasonable given the distance and time.
After the second pass, the two of you seperate almost 3k, at which point he does a low-G nosedown turn to point back at you. This is also realistic given the time and distance.
-- Todd/DMF