Lewishornsby

Why am I able to control my blood pressure and pulse with what feels like a switch in the back of my brain? I am sure this sounds crazy but I made a video of me doing it before and after with a blood pressure machine. Another person I found who can do this has managed to get an EEG readout whilst doing it. Here is me "surging" its very odd http://www.youtube.com/watch?v=xt-YzMNPbKg