Exercise: panning with different shutter speeds

This exercise required me to similar to the capturing of movement with the different shutter speeds but to 'pan' the camera, a technique I think needs a little more practice.
Both picture 1 and 2 were 'panned' at a shutter speed of 1/6s

picture 1: f/6.4 ISO200






picture 2: f/6.4 ISO 200