i pulled my first ones head right off, second one i had to finish with the axe, third one i got just right. you can feel it when the neck gives, and its instinctive, theres no denying that its a violent act and thats what makes it hard to overcome, but i reckon its better to learn by a mistake or two first and then be able to do it properly all the rest of the time. just keep an axe ready while you practice. does that sound harsh, i dont mean to.