|Looks fake to me|
Topsy was considered too much of a threat after killing three men in separate incidents (including a drunk trainer trying to feed her a lit cigarette); She was electrocuted in 1903. Thomas Edison filmed the event, and it's become quite popular.
Interestingly enough, Topsy was going to be hanged, but it was deemed cruel and inhumane. That apparently didn't occur to the residents of Erwin, Tennessee in 1916. A crowd of about 2,500 attended the public hanging of Mighty Mary, who had recently killed an inexperienced trainer. It took an industrial crane to lift the five ton elephant, pictured on the right.