@Thereisnothing Hmmm I guess if advices were prohibited here, there would not be any megathreads on methods and there would not be so many people asking. If I am wrong, please, feel free to quote the rules :)
Ah, sure. I guess you didn't read much about what may happen if you do not practice and try to CTB from your first try.
1) You won't die (or it will take very long hours to die)
2) In emergency department you will be given an oxygen mask (100% O2), in some cases you might be transported to another hospital where you will be in a 3-atmosphere O2 camera. And it may cause you harm
3) If you fail and have a severe CO poisoning, you may have permanent neuropsychiatric symptoms like amnesia, dementia, psychosis, etc).
4)You may have stomachache and problems with your ability to see things, seizures, deafness when wake up in hospital
5) You will have dizziness and start throwing up
6) Toxic brain damage.
7) And of course psych ward when your blood is free from carboxyhemoglobin
PePH won't tell you this, I am telling. So, please, if you decide to use this method, make sure you have a fatal concentration of CO in your tent.