not to be inhumane but.... trust me if you hit it hard enough it only takes once... use a fred meyer bag... and it does not take seconds for an animal to die when being constricted. were talkin 20 seconds and usually the animal is still moving if not still screaming. not to mention the prey gets bit in the face to start out. so im gonna say one quick knock to the head beats gettin bit in the face and squeezed to death any day.