Russian close quarters pistol fighting...useful or just plain crazy?

Note.  Don't know if this is real or not.  I've never seen anything like this before.  One thing is certain.  This is situation specific BIG TIME.  I've had the pleasure(?) of having to read over quite a few shooting incidents lately and I can't remember even ONE OF THEM that was approaching the scenario he's practicing here.  I'm leaning toward crazy but want to know what you guys think...especially the folks that have been there and done that.

Где там ваш чудо Джон Уик ? Выставляйте, посоревнуемся pic.twitter.com/DeOR9Fb7o9

— Денис Дионисов (@DenisDionisov) December 28, 2019