Can anyone discribe this dog "Neck Snap Method"?

Many years ago a powerful friend of mine was attacked at night by a German Shepherd dog. The dog lunged at his chest and he grabbed it by the neck and rump, in his words he then "broke it's back over my knee". The next morning I helped treat the bite wounds to my friends left hand and saw the dead dog in the ditch, it's body was bent at a right angle.

At this time another friend of mine is on IV antibiotics to combat infection in his arm from a dog bite received during training. After the bite his arm swelled quickly and painfully to his armpit before he went to the hospital.

Mike