1. In running, however, the arms move in a forward-backward motion in relation to the trunk. 2. He catches balls less frequently because of the pitcher's backward motion ( the frequency decreases ). 3. Simpson started rocking in his seat in a forward-backward motion , often looking up at the ceiling. 4. The video was shot in a backward motion . 5. Rapid forward-backward motion , such as punching in a boxing game, is controlled by the acceleration sensors. 6. One roller detects the forward backward motion of the mouse and other the left right motion. 7. The reason for this is that, unlike the forward-backward motion , both arms are synchronized in their upward-downward movement. 8. The curtain arrests the backwards motion of struck balls and pins, so that they fall onto the pit. 9. When the hammer is pulled backwards the internal spring compresses, exerting exponential pressure against the hammer's continued backwards motion . 10. The stroke with the front segment pushes the creature backward a little, but the other segment is down limiting its backward motion .
