Another carbon dioxide question:

When I studied in Germany, there was a time when I lived in a students' dormitory and we had a very small telephone niche on our floor with a door to close in order not to disturb other students by loud talking.

Once after about half an hour of vivid talking with the door closed I felt as if I was going to faint.

I think the air volume in there was only about half as big as in a normal phone booth (their outer measures are 100x100x220 cm in Germany), but the door was less tight.

But I also know that "feeling as if" and really fainting are a long way from each other. I think there are no cases reported of sobre people fainting in phone booths.

How long can one remain concious with, say, two cubic metres of air? Or with one? Or do they have some secret airing system in there?

(good thing everyone has mobile phones now)

 Is it the reason we exist at all? Because atoms can be in more than one place at any time it is not until an atom is measured or viewed that it then takes up the position that it does, so without anything to view it an atom is in many places at the same time, do our thoughts cause this three dimensional universe we live in to exist, to be, to happen? without some sort of consciousness, a viewer, be it human or any other life form this universe would not be here, I would not be writing this and you would not be reading it. Is life just thought? And so does it gives us the ability to live in a physical form in a three dimensional world? 

When I play rugby, I sometimes have 'blackouts' where I regain conciousness at the end of an act such as scoring a try, and have memory of getting the ball, but have no memory of what happened in between and presumably no consciousness at the time. What is happening here; is it a common experience and is it advantageous (it usually occurs during my best play) or a sign of something wrong?