Question about killing an elephant

I'd say use the basic fear of animals : Fire.

Fire will scare any animal away as far as i know, that way killing it isn't your only option.

If you must fire a gun at it (which is considered a futile weapon) aiming for the mouth or the ears will generally be more painful and disruptive to it, generally any part of the elephant's skin is sensetive and it won't care if the shot is lethal, it will hurt it and give you enough time to run away reaaal far..
And if you're a good shot a well lined-up shot from a Magnum (perhaps) through the mouth will most likely reach the brain, since that's where the skin offers the least resistance (skin around the mouth, that is).

Although a silly question, who knows when any of us might have to really kill an elephant, and where better to put silly theoretic questions than on a board on the internet? Heheheh..

Jam it back in, in the dark.