Yeah, sounds like has been "sampling" his product to much! When you said this about him, I thought of a long time friend of mine that cooked his brain on crack and meth to the point I couldn't trust him around me any longer.
He doesn't deal with crack or meth....that I know of but he does love the weed lol. I think what he needs is a strait job so he can get back to normal life. Problem is he makes better money with the side business lol.