The fascinating phenomenon in which you and your best friend, both, clear the bong and then realize that in spite of the bowl being empty you and your best friend can still both hit the bong multiple times and be completely immobilized by the entire experience.
(Casey) "Baxter, holy fucking shit.... it's still going."
(Baxter) "I know dude it's freaken me out so bad... I've heard about this shit dude...it's called the ZegBax Phenomenon... Saw it on Discovery.. Shits wild.."
(Casey)"Damn dude, boutta pass out, we just hit that shit like... ZZZzzzzzz..