As its a public youtube video, I'll put the direct links here. Interesting, but I don't think the disconnecting of the battery was intentional, though it looked like it.

https://www.youtube.com/watch?v=pdM9YOYrcbs#t=45

A Montana grizzly bear attempts to retrieve an electrically charged, road-killed deer. The deer is electrified as an experiment to protect hunters’ game kills and, in turn, to minimize bear-human encounters.