Quite some time ago when I was trying to beat my personal record fro holding my breath I discovered that if I breathed in as deeply as I could and then swallowed outhfuls of air to breath in more, then held it in, after a few second i get very light headed, my vision clouds, warmth rushes to my head, my brain feels disconnected fro my limbs (I have to actually think about moving them). I thought it was kind of interesting and felt good so whenever I get bored I do this (at least once a day, normally a few times). Now I am worried because a few days ago I did it and I lost control of my body and my arms started shaking a little bit and just then I went outside and did it. This time blacked out for a moment (is this called a brown out?) lost connection to reality and hallucinated bein thrust into a strange nightmarish world in which i was on the floor of a room with chopped loggs stacked against the walls and hay on the ground, the lighting was similiar to that of a fires. I thought I screamed at the time but know I don't think I did because no-one came to check on me.
So, my question is what is it that I am doing and is it bad for me (I'm going to stop now whatever your answer is), on a side note, i havn't been able to concentrate lately perhaps this is a related problem?
