You can't drown without water filling the lungs, drowning is defined as doing so.

Well, all I am saying is tingly sensations or hallucinations (cause by holding your breath, quite similar to drugs as a matter of fact.) are definate signs of brain damage, occuring. Doing this a couple of times will not hurt you but doing it frequently can lead to disorientation etc. Your regimen i...

TIngly, numb, high, waking hallucinations are all symptoms of brain detrioration my friend, usually, when a swimmer starts seeing things and feeling high he goes up and gets a breath of air.

Getting in the state of numbness etc. is basically cutting off oxygen to your brain, which leads to brain damage, I.E. killing brain cells.

You're also killing brain cells in the process! Lack of oxygen kills cells that can't be replaced. I wouldn't recommend doing this frequently.