Kettlebell Jerks are just a great explosive exercise to add into a training mix.
I find them phenomenal for developing upper body strength and power - they're also great for slapping on shoulder and back muscle. And, if you're into that sort of thing, a really nice pump :)
Jerks are also fantastic for full contact sports.
Finally they even have an advantage over barbells! You need to control and manage two independent weights rather than the simpler barbell.
Bars do have the advantage of being loadable though :)
Video clips of kettlebell jerks coming soon