Some time ago, the French railroad company (SNCF) wanted to test the new high-speed train (TGV) front window resistance when hit by birds. So they borrowed an idea coming from England, which consisted in throwing chicken on the train window with a special cannon. Unfortunately, all the tests failed, the thrown chicken kept breaking the glass. So they told the English people that the system did not work at all. The reply was : "The chicken must be unfrozen before throwing them ..."
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