What was the Active Mass Shooter Training like at Estes Park Highschool?

I was laid out between two glass doors, coming in from the main entrance of Estes Park High School. It was a side entrance, and the door could not close because of where I lay half in and half out.

The smell of smoke filled the air as a strobing light flashed, and the electronic blare fire alarm sounded loud as the intercom instructed students to lock d…