Compressed air causes the tentacles on the predator and octopus whips to thrash in every direction at once hitting the duct work and wiping it clean. If there are pieces of heavy debris that will not become airborne, you will use either a forward or reverse blowing skipper ball to push or pull the debris to the suction hose. The Octopus Predator Whip has less “wallop” than the Mini Predator. The Mini Predator Whip has less “wallop” than the Single Predator Whip.