Janet Foy starts this session on the Fourth Level test by explaining the movements that are added at this level, including shoulder in on centerline and common problems with this movement. She first has the two demo riders ride shoulder fore to shoulder in to shoulder fore on the centerline and points out how difficult this exercise is. Janet then has a rider demonstrate the trot work from the beginning of 4-1 through the half pass, 10 m circle, to shoulder in while explaining some of the issues that arise during these movements.  She asks an interesting question on which of these movements has the most bend with a surprising answer.  The next rider rides the beginning of 4-2 and Janet comments on how this test demands stringing together many movements in a row so that problems with any one movement can compound into issues with the next several movements.