Two candidates enter this
As soon as the door is closed, they face a fan blowing a force 8 wind! To try to calm the heat of this wind tunnel, they have a shield that they must try to press against the fan to suffocate it. Calm restored, the key falls from a pipe in the ceiling that a candidate can retrieve.
This test being very loud, the candidates cannot hear their team. When it's time to go out, a red light comes on to their left ... provided they notice it.