I'm assuming the reason they were richarding around trying to get them to crawl over in the first place is because they were afraid someone could have been around either of the corners down the hall waiting to shoot them while they were distracted, but it's very obvious none of the cops involved received any real, formal training on how to deal with a situation like this. This is a bunch of beat cops trying to pretend they're SWAT, and the result is what you'd expect when you send a bunch of untrained people into a situation like this.