You open the door and hot air comes out brushing agents your face. You walk in and look around. There are holes all around the field and right as you wonder what they do one right next to you erupts and shoot out flames to the ceiling. leaving a scorch mark on another hole which then sends another blast of flames to the ground.
There are holes in every direction and you have to be near one no matter what so when all of them go off every 5 minuets you have to be hit somewhere unless you have some kind of bloodline or jutsu to block or deflect it.