We have an adult male calico ATB that behaves like that. He tracks everything that moves, but he's never once struck at one of us. We can open his terranium, move things around, move him, clean, etc. and he just sits and watches us. When we're holding him, he reaches out to people and things like that as well (kind of like a Ball, really). The only time he gets in strike position is when it's feeding time (he's got his schedule down pat). He'll figure-S and wait for the food and strike at it, but that's it. We actually don't know how he became as tame as he is because we bought him at a trade show from a lady whose husband had bought him from a breeder. She didn't know much about his previous life (other than that he was "nice") and her husband wasn't with her. It's funny, because we actually made them prove to us that he was nice because of our previous experience with our other ATB. She'll strike at you through her glass for simply walking across the room.