My parents had a hobby farm when we were little. I suspect more for instilling work ethic than for any edible benefits. I guess about the time they were getting out of it, they butchered all the chickens. My sister was about 3 or 4 at the time. A headless chicken took off running about, (as dad would say, "Hence the expression"). My sister also took off running, absolutely terrified, and managed to run in the exact same erratic pattern at the chicken, giving the apearance that it was chasing her. It managed to follow her for 2 or 3 zags. At the time (being an older brother) it was absolutely hysterically funny.