I'm not sure again do I need to tag this but I'm playing it safe. He mentions in the video that some people have claimed that there's some forcefields around the Citadel that allow you to breathe outside without a helmet... [B]BUT[/B] aren't you wearing a helmet when you're walking the side of the Citadel on Mass Effect 1 to get back inside and face Saren? That means you actually DO need to have a helmet on in order to breathe outside the Citadel which means the hallucination/indoctrination theory makes more sense again..