A new way in 1000 Ways to Die?
http://www.google.com/search?hl=en&rls=HPIA,HPIA:2010-32,HPIA:en&tbs=vid:1&q=1000+Ways+to+Die&source=univ&ei=kAAcTYPqI9WinQemtZz1DQ&sa=X&oi=video_result_group&ct=title&resnum=4&ved=0CCgQqwQwAw
Quality necklaces have a weak link to break if too much stress is put on it. A common approach is to leave a ring near the end unsoldered.