Apparently I was the same in my final stages too. DH said that my eyes rolled back in my head and I was completely unresponsive (until each contraction when I pushed like a mad woman and then slipped back into my coma like state!!). He was completely freaked out. The MW told him that my body had started to release endorphins to help cope with the pain. She said that this was totally normal and actually a positive sign as it meant that labour and birthing was progressing well. I had a drug free birth but I actually remember doing this. It was like being on the most amazing drug like high... If only we could bottle that!!