Teleport

Teleporting allows you to quickly change your location to another space in the current level.

You can teleport at controlled times by zapping yourself with a wand of teleportation, applying a wand of teleport, or reading a Scroll of Teleportation.

You can teleport at random times by wearing a Ring of Teleport or acquiring the Teleportitis "disease" (see below). You can remove this state by taking off the ring of Teleport.

The message for this is "You feel jumpy".

Teleportitis

Teleportitis is a state where you teleport at random times to random places. You can acquire this state by drinking from a fountain, eating certain unicorn or magic mushroom flesh, or walking through a magic cloud. It will wear off eventually. You can control where you teleport if you have TeleControl.

TeleControl

TeleControl is the ability to control where you land when you teleport. The distance from your current position is limited based on your Intelligence. If you try to land past this distance, in an unvisited area, or on top of an obstacle such as a wall or monster, you will instead be teleported randomly. You can acquire TeleControl by wearing a ring of TeleControl or eating a Blink Dog corpse.

"You feel very controlled"