Yeh, I never thought it was, but perhaps headed in that direction... but tell me more about smoking it, and how you do it.  I do use a glass bulb, were the fire cannot touch it.  Then I put the lighter right under it.  Does it make a difference if I go slow?  Why?  I want to try a smaller amount and then heat it as gradually as possible and draw it in as slowly as possible to test what you say, as opposed to an explosion of vapor.