i dont know the whole tek but its kinda like freebaseing, you have a folded piece of tinfoil, you plac the opiumon it, roll a straw with the foil, hold straw in mouth over the opium, hold a lighter under the foil below not rightunder the foil, and the opitm will start to smoke. move foil arould following the opium with the straw, as the opium moves alont the foil it leaves a trail of ash, keep making the opium follow a new path until all gone. This is called chasing the dragon.