In terms of the jump one foot is released, then both hands push off before the remaining foot pushes full weight of body up and off. The body and feet twist slightly in the air but once she is on the ground the feet are obviously still but the body continues to twist.
On landing the knees brace and the body is at a slight diagonal; after impact the body rights itself and the knees straighten whilst the arms have a follow through movement. The left arm jerks upwards more because it has had a greater distance to move on the body twist. The top part of the arms move first before the bottom and the elbow catches up.