A break-in depends on a successful approach towards the target and on the concealment of the act. A manual for a thief would include methods of concealment and disguise as well as methods of orientation, breaking through walls, windows or locks. These techniques are tactics that misguide  the gaze and make way through built environments, that could be a reading or  designing tool.

 The construction details of secret doors of hidden rooms and passages include hinge mechanisms and covers, which make perfect surfaces without joints. This leads to an always-already  hidden  interior that is there to be observed from the outside.

 The action plan for a robbery calls for a penetration of the bank's and safe's walls. Forcing entry through an interior, questions the ability of an interiority to secure. In the new syntax that is created through this action, the wall is transformed into an entrance. Such invasion techniques are used in modern military tactics, for example in the Gaza Strip. The surgical operations on buildings for the pursuit of military targets, "create a world of infinite fluidity", depriving the interiors of their ability to enclose.

 Eyal Weizman's "un-walling of the wall", Gordon Matta-Clark's diggings and cut-throughs and the thief's break-in, constitute a violent intervention on the built environment. The threshold is of central importance to these invasions ,as the point of transition between inside and outside.