I think it's because of lack of oxygen. You get used to the smoke so you take bigger hits and your body gets less O2

...just a theory though
johnruss2 Reviewed by johnruss2 on . Black outs. I have been smoking the same 4 strains for about 3 months now and I latley I have noticed That I am Having Black outs when I exhale the bong smoke. (its the same kinda Buzz when you stand up to fast).. I have been smoking it for ages and its only started happening latley... does anyone else get this.? :confused: and is there an explenation for it.? Rating: 5