This is one dynamic solution in a broader system called barricaded flow. The point of barricaded flow is to work from barricade to barricade and make your decisions on what your going to do on route to your next barricade from your previouse one. So for example you can call dynamic right and front from the last bend in the hallway, wait till u have the 4 u need then execute from the begkning of the hallway and push into both rooms. Theres alot more u can do with barricaded flow but thats just an example. And if this isent barricaded flow... then they are not playing with a full deck and are just copying things they saw on instagram.

Nice bumper sticker...

I get that your thinking deliberate clearance and such and threshold assessment, it starts to break down alittle with open doors in hallways or multiple open doorways. This thing they are showing here im sure is only used for specific places where a more deliberate aprouch cannot be used. And then they can slow it down where the more ideal safer methods can then be employed.

that makes sense@@notsure9301