It must have been the Police helicopter that clipped the windfarm as it was following you at 3am to the shoreline as you tried to bury the bodies of the aliens that crashed a few weeks ago...
Surely, if you know the rotation speed of the turbine and look closely enough at the damage to the blades, you can work out the speed that the "object" went through the blades at??? Any keen aircrew students want to work that one out for teacher???
SB