just how unpredictably dangerous elephants are.
The wiki article is also informative.
Animal behaviour: Rogue elephants
Attacks by elephants on humans, both in Africa and India, have been increasing dramatically in the past five years. As villagers tell of 'revenge raids', scientists argue that loss of habitat and social structure is seriously destabilising these magnificent creatures. Justin Huggler reports from DelhiThat elephants are capable of ferocious violence is nothing new: they are not quite the cuddly animals the West seems so fond of portraying. They were the tanks of the ancient world, used to charge in battle by the Persians and the Indians, a practice that was quickly copied by Alexander the Great. When Alexander's army mutinied after his death, the generals put paid to the insurrection by throwing 300 offenders to the elephants, who crushed them. Hannibal, of course, crossed the Alps with his war elephants in tow.
But what is new is that the incidence of wild elephant attacks on humans has been increasing drastically in recent years. Just over a week ago, a British man on his honeymoon in Kenya was trampled to death by an elephant in the Masai Mara game reserve. In the Indian state of Jharkhand, 300 people were killed by elephants between 2000 and 2004. In Assam, 239 people have been killed by elephants since 2001.
Until recently, this was thought to be simply down to the fact that human and elephant habitats are increasingly colliding. As human settlement and agriculture spreads over more and more of the available land, the wild jungles where elephants thrive are shrinking, bringing them into more regular contact - and conflict - with man. But now scientists are suggesting it may be more complicated, and tragic, than that.
http://www.independent.co.uk/environment/animal-behaviour-rogue-elephants-419678.html