FAA uses one tricky device for testing the strength of the windshield of an airplane. The essence of the experiments includes that this device throws with the certain speed a carcass of chicken into the glass. Thus if the windshield remains safe they believe that in real flight the head-on collision of the airplane with a bird will not lead to breakdown of the glass.
And recently English produced a new super-high-speed locomotive and fell in thoughts whether the glass can suffer from collision of the train with the flying by crow. They took this device from FAA, calculated the impact force at the maximal speed and started testing. The carcass broached the windscreen, without a trace blew off the control board and formed a big dent in the wall of the machine room. Everyone is shocked. Contacted FAA, asked to have a look at the report of testing and hint, whether they have wrongly adjusted the device. FAA thoroughly analysed all details and replied that they would prefer to repeat testing of the locomotive windscreen strength using a thawed carcass of the bird (P.S. the latter was initially taken from the fridge and was like a stone.)