[OceanMan]

Hi,

It's not a samba. Samba comes from lack of oxygen.

I think you are just getting a very low blood pressure because of numerous factors:
- quick stand up
- full lung
- and hyperventilation

Try this : after your final deep inhalation, do a 15" static apnea, then stand up slowly and start your walking apnea. Don't pack. This way it should be alright.

If I don't do this I always suffer from low blood pressure in my brain and I have to stop the apnea and sometimes put a knee on the floor to avoid falling and hurt myself.