MLeake, the 'getting in the arena' part is easily feasible but I do think that shots would have to be fired before getting in due to time constraints, safety, pack mentality, etc. I would guess 11 feet by the video and there is a net to at least assist. There isn't too much room to have flexible entrance choices though.....the fences have the sightseeing bldg or lodge in between with a big, big open window with the railing. One's height obviously makes a difference, but basically for the average adult you have an unrestricted viewpoint of the dogs to say the least and they are below you. The child was directly below the window at least to start.
"Damn the torpedoes, full speed ahead!" -Admiral Farragut @ Battle of Mobile Bay 05AUG1864