[WayneS]

...its motion creates impressive force delivered to a very small area, which can produce significant injury.

The same can be said for a bullet.

[yefragetuwrabrumuy]

Except nunchaku can also easily deliver lots and lots of less than lethal injuries quickly as well, against both soft and hard targets. For example, used properly against the back of the thigh and you will give somebody one heck of a charley horse, that will turn into a painful knot and a heck of a bruise.

And, for those times when you want to send a message, not just kill, nunchaku can deliver a top to bottom, 360 degree of ouchy places.