Anybody use medice balls?

P90XCertifiedCoach

I watched a infomercial last night on Kettleworx, My little gym doesn't have kettleballs but has orderd some kettleballs. I saw some medicine balls that ranged from 2 pounds to 12 pounds. I imitated some of the workouts I had seen done with the kettleball. I had a HELL of a workout. I calculated it as Circuit Training. I really enjoyed the workout. Does anybody know of any videos out there that have medince balls that are used for cardio /weight training.