To the anon that asked if smoking out of different things could change the high tolerance: yes. Studies show that the body builds tolerances to drugs in an environment specific way. If you always smoke in your bedroom, your body gets used to being high in there and "prepares" itself. If you go smoke somewhere new your body isn't expecting it. Cool right? There was an od case with an old man who always took meds in his room. One day he took them outside. He died of an overdose.