You can put in your bowl and smoke it. I've heard people use it to make butter with aswell. Never done it and can't imagine it being very good butter. As far as smoking it, THC burns at like 365 degrees, and some of the other active chemicals burn a little hotter(385 maybe), so the left over matter is all super dried up. With that being said, and based on how much you vape a hit, there is deffinitely some left over that the flame burns. Hope that is accurate, and helps you with your question.