I've heard about this before - I had it bookmarked but then I had to wipe my hard-disk so I lost it. Glad you posted it. I'm going to endevour to try it myself, starting now . . . exhausted already. I'll keep you posted.
By the by the science behind it if I remember correctly is that it builds up the CO2 content in your blood and forces your carotid arteries to expand and this carries greater amounts of oxygen to your brain, increasing your intelligence.
