In order to reduce the consequences after an explosion, it is recommended to cover the window with adhesive tape, and leave the door open. 

Military expert Oleg Zhdanov said this. 

"During the explosion, the glass flies out, because it has a very low coefficient of linear distortions and it is fragile. And therefore, when there is a shock wave, it is perceived by the glass as a normal impact and of course it breaks and flies out. The door is jammed across the square. There is the same shock wave effect as glass. But the door is made of a material that has a good coefficient of linear variation. The door deforms and can move. So the door can jam after the explosion. I've never heard of a discharge wave after the shock waves. And that's why they sometimes recommend keeping the doors open when there is a fire attack. We glue the glass so that there are fewer fragments and we don't get hurt after the bombing, and we open the doors," explained Zhdanov. 

We will remind, the GUR told how the Kremlin elites want to distance themselves from Putin.

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