I understand killing rattlesnakes, and other venompus critters, close to the homestead or barn, but it pisses me off when any wildlife, including snakes, is senselessly killed because someone doesn't like them when on PUBLIC land where they have a right to be and are a thriving and necessary part of the eco system (I saw two dead just today because of peoples' prejudice).

Any animal can and will twitch after death and I have heard of jaws of snakes clamping shut after they have been beheaded just like the rest of their body moves after decapitation. I've seen it in dear too.