i was watching that documentary / tv show, on ITV2 last night, commando, on the front line. they had the recruits despatching rabbits, then skinning them. they were using the old bruce lee chop. the instructor had to do it twice as it didnt kill the first time and said that he was doing it again just to make sure. in my opinion the quickest way & most effective is the method of grabbing the back legs and the head to break the neck nice & quickly.
richie