This idea is about a door that can be shattered easily from one side of the door but from the other side it will be just like any other door, difficult to break. The Problem that can be solved by this kind of technology is that in case emergency, like for example you get locked inside a room, you will be able to break your way out. A simplified schematic is shown in figure 1.
As shown in the figure, this simplified version show a cross section of a door. If some pushes the door from left to right it will break easily into three pieces. But if pushed from right to left it will support the structure and the door will be reinforced and it will go stronger, the only exception is that the shock was big enough it will break the door on according to material type.
The shapes of the pieces of the door can be any interlocking shapes given that they will support the structure from one side and detach from the other.
Applications to this door technology can be for normal houses and any other room that someone might use.