Let's see, I'll take a stab at this. If I didn't have enough oxygen to breathe, then that would mean I'm either underwater or way up high...on top of a mountain!! But since I live halfway up the side of a mountain anyway, that would be all right with me! And the place I would most like to visit in the world is Tibet, where there is not enough air to breathe, but the people have adapted. The thing I would need more than air is sunlight, you can be pretty miserable if you don't have sunlight on top of a mountain!!
The person below me can flare their nostrils like Heath does in the Lightning Flat scene.