You're missing a very very important point. Hold your breath. You'll notice that after a while you will begin to develop a feeling of urgency to breathe. This occurs because your lungs detect the presence of high levels of CO2 inside of them. This is how your body tells your brain "BREATHE...
I read the article, then came here because I googled that same question. I have a solution to the mystery of the exploded cans.
A father was living in the house. He was the one who was killed by the CO. The son inspected the house after the incident. He found the exploded soda cans.
My...