Eyewitness reports contains facts that can be checked objectively. I.e witness reports powerlines oscillating in opposite phase in presence of UFO. There are also photographs showing strange things like a fuzzy dark mass beneath the UFO or multiple dark rings around the UFO. This can be explained as light polarisation in presence of intense magnetic field. It is even possible to estimate the strength of the magnetic field. This is something eyewitness can't make up. There are also reports of rotating compass. This can be explained and can only happen if precise conditions are met i.e oscillating intense magnetic field. By knowing the properties of the compass it is possible to determine the frequency of the magnetic field.

If there is some reality in this phenomenon, it is possible to find evidences in the testimonies that can be indirectly objectively checked. This is science process.