Defendius Door Chain

Genius!! This creation is absolutely awesome. This is because the Defendius Door Chain was designed just like a labyrinth wall. Solve the puzzle and you can open it. Let's see from the positive side, this invention is designed as security gadget with a few little twist. It clearly sounds good for those wanting to gain unauthorized access.

But.. How we want to get out? Does we need to complete it each time we want to get out? I am not wasting my time to solve this puzzle especially during an emergency.

At very first impression, this invention is quite good. Safety first, but when you think about it many times, you can clearly see that it is not very convenient if you have an emergency.