Only hold for six seconds - after that you're just getting crap in your lungs. That's probably one of the most valuable pieces of information I've learned on these forums.

Huge bong hits won't collapse your lungs. Does holding your breath for a long time hurt your lungs? Think about it.
LuckyG Reviewed by LuckyG on . can large bong hits give u lung problems? I have heard that taking really large bong hits/holding in hits for a long time can give a person a collapsed lung and other problems. Is this true, and are hits from the bong bad for your health? Rating: 5