This testchamber is very simple, though you'll have to wait around a bit at first. There's a doorway that's locked and you can't do anything to open it. Except wait. The door will eventually open, and ...

In this testchamber, you'll be introduced to little turret bots (we call them turret buddies). Their laser sights will lock onto you and the turrets will follow by drilling you with machinegun fire.