This is why good gun range management and maintenance is so important, boys and girls. Unless you enjoy flash fires, of course. Based on the officers’ uniforms, it appears this took place in the city of Aracaju in Brazil.
Take a look (the action starts at about 1:10):
It’s hard to tell what that mat in front of the shooting positions is for…maybe someone’s bright idea for making it easier to pick up brass.
Now ask yourself this question: how well run is my favorite range?
H/T Ed Head