It can be what every you want it to be.

Pat Derby expects to get a reaction with fire extinguishers, vehicles, and noise makers. That's correct. Dr. Joyce Poole gets the same reaction from the sound of a bull in musth. Or does she get it with a sudden noise out of an inanimate object. With respect to Dr. Poole's 30 years of studying wild elephants, my 30 years of studying captive elephants can get that same reaction by sliding a door open, throwing a super ball against the walls, or running a radio controlled car through the paddock/pens. A groom was watching a video once, and the power went off. When he kicked the breakers on a half hour later and the video all of a sudden resumed, there was more ear folding and urinating then you could shake a stick at. It was a Shreck dvd if that has any bearing. I wonder why two were isolated, and the two on the other end didn't, hear it? If we assume they had an inborn knowledge of what that sound was, next time somebody says, "what the heck was that noise," just tell them, "why are you asking me, you should know?" Also for what it is worth, "my studies are expensive, but not as expensive as Dr. Pooles "or" building an elephant exhibit at a zoo. So for you folks that are not rich, and think there is nothing you can do to help, send it my way." You definatly have been to school Dr. Poole, that's called "psycological manipulation." Religious sect's use it "religiously."