An Endermen trap created in the End, unused.
The purpose of an Enderman Trap is for the easy access and killing of Endermen. It is possible for the user to create such a trap that can be used by simply standing still, and looking at the Endermen. This angers any you look at, luring them into the trap.
This trap is to be made in the End world, as Endermen spawn at a considerably high rate in groups, where as in the Overworld, only a few will spawn, rendering this trap almost useless. Nevertheless you can still create this trap in the Overworld, but the consistency of Endermen are very rare.
A demonstration video of this trap named the "EAT Machine" (Enderman Automated Terminator) is available on Youtube. This shows you the trap being used, and the looting:
http://www.youtube.com/embed/BdB6zqnMWjz
Usage
With this trap, a user must stand on the top of the tower, and look at all of the surrounding endermen, so that they are angered to run to you, and fall into the pit. Then once the user has gathered the desired amount of Endermen, pull the level/press the pressure plate etc. Which then crushes the Endermens' heads (3 blocks from ground).
EXP
It is possible for the user to gain EXP from this trap, as the character hitting a mob once will register the mobs' death as a user-kill. This means that even at with the pistons crushing the mobs down to healf a heart, can still give EXP from the player hitting the mobs at their point of death. It is also possible to switch the levers and pressure pads with a button, than can be timed to crush the Endermen, then release when they reach the HP of half a heart, Ready-ING the Endermen for a one hit, one kill.