She's being held behind the head because, well she's got a bit of an attitude problem, ok ok she's unbelievable. Not only will she musk, strike, bite, pee on you she has stepped it up a notch and will slap her tail on you and poop all down you smearing it in. She's one of his favorites and he has been working with her from the day she hatched out. He's actually making progress (although I think she's just waiting for us to let our guard down!!!).
He's just got her head to keep her from swinging at me while I took the pic.