Apparition is a magical form of teleportation, through which a witch or wizard can disappear ("Disapparate") from one location and reappear ("Apparate") in another. It is usually accompanied by a loud cracking or popping sound, though the more skilled wizards such as Dumbledore can Apparate "so suddenly and silently" that they seem to have "popped out of the ground". According to Harry, apparition is also accompanied by a very unpleasant squeezing sensation, as though being sent through a tight rubber tube.