[quote=@Lucius Cypher]
Effectively gives a knife a sort of light saber whip effect. If that seems confusing congratulations, that is exactly how such a spell can often befuddle an opponent who doesn’t know what the spell is, or even an ally who isn’t used to having their weapon capable of such a thing. After all most people are not designed around the abilities this spell can provide. 
[/quote]

Well I suppose that point of view can work with a little suspension of disbelief. Personally though, I think my interpretation of the matter makes a lot more sense.