a friend of mine sent me a link called "15 future weapons that will certainly make a mess"
the 2nd weapon is the spyderco warrior. the write up on it said
"this particular weapon made the list for one specific reason. According to a representative of Spyderco – the company that created it – the serrations on the inner edge were designed with one thing in mind – beheading."
link here if interested
i was under the impression that the serrations were used for trapping your opponents arm. maybe the author stretched the truth a tad?