At high speeds, motorcycles and their riders may also experience aerodynamic flutter or buffeting. Also suffered from transonic buffeting in powered dives; two were lost to tail separation. Some taller riders complained of wind buffeting with the smaller S model stock windscreens. Such buffeting would otherwise cause crew fatigue and reduce airframe life during prolonged flights. Because it is floating, in even a light breeze it is susceptible to wind buffeting. This redesign resolved tailplane buffeting and fatigue issues incurred by operating the thrust reversers. The perforated flaps were invented to eliminate tail buffeting during diving maneuvers. Airspeed was further reduced, but the buffeting continued. A tonneau cover reduces buffeting at all speeds. At speeds in excess Mach 0.71, increasing levels of buffeting were encountered. The lander was ejected once atmospheric buffeting broke the interplanetary bus's lock-on with Earth. At high speeds, even minor deviations from a straight path may add considerable buffeting. The new nose introduced buffeting the source of which was traced to the bulbous canopy. Warning of the stall was given by buffeting and would occur before stall was reached. It causes buffeting of aircraft structures and control surfaces.