This delay-caused pilot-induced-oscillation reminds me of trying to drive some of the simulated vehicles in current video-game environments. The video (and other) effects are stunning, but the experience is marred by the delays between the controls and the perceived video. Unlike driving a real car at >100mph, for example, where the effects of control inputs are felt immediately, the control inputs in videogame-simulated vehicles have a noticeable delay. These delays can cause uncontrollable oscillations if not consciously damped by the gamer. Analogously, a gamer who gets into a real car and attempts to go >100mph will find the opposite situation -- he is expecting a delay, but instead gets instant (and potentially disastrous) results, compounded by the real inertia of his arms & legs interfering with any recovery effort. ------------------------------