Pointing in many cultures it was believed that a witch or sorcerers had the power to kill someone by pointing at them.
If the Pawang from Malaysia pointed his magical dagger at someone it would trip with blood. Various Native American tribes have legends of pointing at animals in order to kill them.
The thought behind these legends is magicians have the power to use their will like a weapon and directed at others. If the witch wishes that the injury flowing from her fingers attracts the dark forces needed to complete her wish.
**Food for thought does that which truly hex her victim or is the victim’s belief of the witch’s power bringing about their own curse?
Image from http://en.wikipedia.org/wiki/File:Finger_pointing.jpg Public Domain