Escape hatch
Escape hatches are features of every floor, similar to stairs in that they allow the player to travel from one floor to another, but different in that they are all one-way. They resemble a red set of stairs, and using them will take you to a specific spot on the floor above or below. If you keep track of where an escape hatch goes, it can be useful for travelling quickly, but be careful; there is no going back, and your destination may be hazardous.
History
In earlier versions of Crawl, escape hatches could prove lethal when used in the Orcish Mines or the Slime Pits. Players would find themselves suddenly trapped in small chambers with no escape routes unless they brought in their own source of teleportation or digging.
In very early versions of DCSS, escape hatches were referred to as rock staircases, as distinguished from the normal stone staircases.
