Ok so I am a regular smoker, I smoked like once a day for like a week leeding up to August 2nd, then I smoke twice on August 1st, then again at like midnight (technicaly August 2nd) Long story short my dad told me he was going to drug test me, but for some reason it didnt happen right then. Starting at 3 p.m. I started floooding my body with water, between 3 p.m. and 9 pm I drank almost two gallons of water, and at 8p.m. i chugged a two litre of cranberry juice, then proceded to throw most of it up (not by choice mind you). *NOTE* PLEASE BE CAREFUL! TOO MUCH WATER CAN CAUSE WATER INTOXICATION WITCH CAN BE DEADLY!!! Anyways two negative tests. Not just one, but two. But I was curious because my friend Luke suggested if I waited for my body to return to regular hydration, I would test positive. I waited two days, with out any contact with marijuana. I bought a self test from Wal-Greens for $15, it came out positive. RESULTS: Basicaly my theory is that as you flood your body with water, it delutes the thc enough that you can pass a test, but as soon as your body returns to the average hydration, your pee will test positive. Just thought I might lend a helping hand into the expansion of knowledge. Or something like that. good luck to whomever this may help.