Yeah this is what happened for me.I smoked the night before.I pissed the next day and I passed.Matter of fact the piss was exceptionally clean,but............then again I drink Lots of fluids(juices,water)I only weigh about 145(not body fats)and my metabolism is very high,so i've been told that this is a major factor.I hope that this helps.Awhiles back I was banging my head about trying to pass this drug test for a CDL trucking school,but since I've relocated to L.A. California,I've decided to go to school at this technical collge so I'm not that pressed about this ddrug testing thing I wish you the best of Luck and the right course.Peace