A friend of mine was all tied up the the legal system for like 3 months and he got off a week or so ago. He had this gay ass wrist band that would monitor his hear rate and sleeping patters and shit. I guess when you consume drugs they restrict your brain from entering the fifth stage of REM sleep or some bogus stuff like that. So anyways he was all hooked up and every day he would take two hits off a blunt or whatever and they were never any wiser. So if you gotta smoke, it isn't impossible.