revanche...if u smoked ONE time (just enought to feel the effects of thc) then u must have a EXTREMELY slow metabolism for it to stay in your system for that long... i have smoked very potent hash and it was out of my system within 10 days...

unless u are very overweight and inactive your body will burn thc much quicker than 2 - 3 weeks for 1 smoke out... better safe than sorry though...