Without ever having been touched, Chris' feet go from leaning on the wall to being curled up in the bench seat.
The position of Chris' feet change, both in relation to each other (first, the right is at an angle supporting the left on the heel, the next shot has the right supporting the center of the left, thirdly, the right perpendicular to the left heel) and to the wall (first, heel on the crease, heel slightly left of the crease, further left and back to slightly left).