[ramstam]

I think hyperventing is a great way to get beginners to boost their confidence
by allowing them to break 4 min quickly(dry static). In order to get longer times I needed to relax and pack(with a good slow breath up) and practice
for a few days in a row. The problem I have with packing is it makes me black out, or atleast my vision gets dim. I added 2min to my static by switching
to packing from hyperventing. In three days.

The same thing happens when I dive, the first 20 meters I can't
remember,but then everything gets very clear. It's like the dive starts
a third of the way down.