But to get back to the point and to indulge in informed/uninformed speculation. My guess is that the aircraft was military, possiblly a C130 indulging in whatever? In an area not often frequented by aircraft, ie away from bigger bases and airports. People are not familiar with the sight and sounds of low flying aircraft think something must be wrong. C130's are often to be seen low level and tactical. At places like Dunkeswell in Devon sometimes very low indeed.........