cause youre nto used to having smoke that DEEP in your lungs prolly. ive seen guys who can kill half a joint in a hit, cough their asses off on a modest hit from a bong, just cause theyre not used to having ALL of their lung capactiy packed with smoke.

i think hes refering to the NORML funded test that concluded that a unfiltered joint was the msot efficient method of extracting THC. However i also remmeber reading in that report that they found while tehcnichally a bong should be less healthy, waterpipe smokers experienced less throat/lung irritation. either way, were talking a negligable health effect here. In fact in another study done among mroe than 1000 LA residents, even those who smoked a joint a day for 60 years, had less of a correllation with lung cancer than non smokers!

check my research if you want.
(uh oh the first link has michigan in it hahaha*cue irony bell*)Study fails to find link between marijuana use and cancer
NORML New Zealand - Marijuana Water pipe and Vapouriser study

happy reading