Part true, part myth:
My uncle works at Rolls Royce, testing jet turbines. They would run all sorts of tests, vibration, extreme weather, and bird strikes. Bird strikes were done by revving up the jets, and tossing chickens in the rotors (this is true).
After a few months he gets a call from an engineer at Boeing. He says “Listen, we have a problem with the bird strike tests, every time we toss in the chicken, the engine implodes. I don’t know how you guys are doing it”
My uncles response: “Guys, seriously, you have to defrost the chicken first!”