Method Did I do anything wrong during hyperventilation practice?

[FutureHanger]

I tried practicing hyperventilation for shallow water blackout so I breathed as fast as I could for about 6 seconds though the rate was like one breath and half to 1 breath and 3 quarters per sec then I tried to hold for 2 mins to see if I'd black out but only got to 1 minute and a half before giving up. Also is blacking out the same thing as being unconscious?

 

[FutureHanger]

@Intoxicated you'd prob know

 

[Intoxicated]

tips for hyperventilation for shallow water blackout?

First off how do I actually DO hyperventilation? Also when practicing what should I expect? When doing CTBing should I keep my mouth and nose shut before jumping into the body of water?

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