During the testing phase of the Concorde, the scientists involved had to make a gun to fire dead birds at the cockpit windows of the aircraft to simulate the effect of "bird-strike". They duly made the gun and used dead chickens as a representative sized bird. The tests went well.
At the same time in America they were developing a high speed train. Hearing of the British trials, one of their team noted that the landing speed of Concorde was roughly that of the train they wanted to build so they asked the engineers if they could have a gun to perform the same tests on the cabin windows of the locomotive.
The gun was delivered, set up and they carried out the first test. The American engineers were aghast when the chicken smashed through the drivers cab window, completely destroyed the back-rest of the drivers chair and embedded itself in the aft bulkhead of the drivers cabin.
They went over all the test data, and not coming up with a reason for the test result, they submitted their test data, reems and reems of it, to British Aerospace in case they could come up with an explanation.