i was high for three days once, but that was numerous sessoins. i smoke until i couldn't smoke any more, then ate till i couldn't eat anymore, then slept, then did it all again until i slept for 15 hours.

And all of this was after 2.5 monthes of being clean. and... i've only smoked twice since then (being 3 monthes now)
smoking massive amounts of marijuana is a good thing