actually it is kinda cheap. Your taking two hits. Even when ur filling up the chamber, smoke goes into your lungs, and when you exhale it through your nose, your making more room for new smoke. When you clear the bong, your inhaling more smoke then if you would have with just one hit.

Sometimes my friends with try this, but quickly get harrassed for it by everyone
MRB041 Reviewed by MRB041 on . bong Tech Ok my friends say i am cheap but i say this technique is completely legit. First slowly milk the chamber to its full capacity, Next exhale out your nose then Suck with all your might until you cant inhale much more, Then slowly exhale, if done correctly the top of your lungs should be oxygen whilst the bottom is super dense smoke, also since you take it in so quick you cant feel it on the way down and never get topshelfed. This isnt cheap at all, right? Rating: 5