My brother was killed, and I slipped into a coma for 3 days. I awoke with a ventilator in my throat and my brain was pushing against my skull. I was told I'd have permanent brain damage due to the swelling, and lack of oxygen. My oxygen level was 13% when I was found the next morning. I never felt sick and just fell asleep sitting down. It is a very serious problem and I suggest everyone has a detector for this kind of stuff.

We were camping in a tent heated with a propane catalytic heater to take the chill out of the tent. Even a couple of hours came very close to killing us both. The only thing to save us was my wife's dizziness, which woke me up. I had difficulty breathing. We ventilated the tent immediately and luckily recovered with any long-term effect. Don't think for a minute that this won't happen to you. You could be poisoned and die in your sleep.

I left my car running for about 13 hours in my garage. Had turned off my furnace as being very deaf, I thought it was what was making the noise when I went out to the garage to get something. That probably helped things, and my doctor attached a gadget to my finger, and then said my oxygen level was normal. A week later I am still very confused in my mind and have lost the pin number on my new credit card, left my checkbook on the cashier counter at Costco, can't remember the cards when playing bridge so have to quit, and can't remember words when speaking, so am going to ask my internist to refer me to a neurologist.

My two nephews were just found dead March 6th in a house that they were remodeling in Ohio. They were running a generator in a garage. They went to sleep and never woke up. Please warn people. It was such a waste and devasted the families.

We were sitting in McDonalds for quite a while (two hours). Later in the day I went home and all of a sudden my skin felt like it was burning up. It took on the appearance of a very bad sunburn, skin turned bright red and felt like a fire. After an hour it subsided, but wondered if this was due to carbon monoxide poisoning. I was told the next day that the restaurant was filled with it. Other people experienced headaches, stomach aches.

For a week or so I have been having headaches and having blurred vision. I can't seem to wake in the mornings and thought I had the flu or something. I found out that our furnace is not burning the gas right. Days later I am still sluggish and I can't remember things.