how do u smoke like this

[Kid Dynamite]

I think it is only possible in music videos. for the normal person to do it you have to hang upside down and chant an acient hindu mantra for 3 weeks preceding the actual smoking. you also have to bathe in goat urine

no its perfectly possible. My friend can do it, he calls it an irish waterfall. Its not exhaling and inhaling at the same time, its a little exhale from the mouth, then a little inhale from the nose, in quick succession.