Smoking heroin is definitely possible. I did it once, not that I'm proud of it or anything. It was some black tar that my buddy had. Smoking heroin has actually become a lot more popular because of the fear of AIDS from dirty needles.

Anyhow, it is really expensive so it would be stupid to put in weed. Any dealer doing that would just sell it as heroin and make a lot more money.

Haze is just typically a very potent strain of weed. So its logical that someone who smokes mostly schwagg or even mids would think it was laced with something the fiirst time the smoke it. Incidentally, true Haze is 100% sativa so it should have a very energetic and up high. NOT what you with heroin.