I just watched a Discovery Channel program where a large heavy duty clear plastic box that fit two men was used to get a close up study of bears and lions .Less than scientific as the animals interact with the people. All I could think of was "Box Lunch " !! ...These were "Bear Feeding Frenzy" and "Lion Feeding Frenzy " with Chris Douglas

That would have been very nerve racking,i think the Bear portion would have been the most anxious for me,never the less they had some great film shots.

I seen a portion of it, the one with the african lions. All I could think, the gun ports are a little small!