If you have a hard flat surface on the ground such as a wide board,concrete,blacktop or even frozen ground you will not have to pull on the chicken at all.Your weight alone will be enough to crush the neck and kill the chicken.Make sure you have a hard flat surface under the neck and all your weight is on each side of the broomstick or pipe or whatever.You do not want the chicken to suffer.The chicken will flip and flop a bit but,these are nerves reacting after the chicken is dead.You do not even have to look if you don't want to.