MDPV springs to mind. I'm not generally much of a stimulant guy, but I'll never forget when it first sprang on the market and I decided to try it without knowing much about its fiendish nature. I remember being in a psychosis, knowing I'm in a psychosis, yet still making more tan MDPV and smoking it out of a lightbulb. My last encounter was smashing a vial of it on a busy street so it wasn't around me anymore.
Not quite as much of a problem, but I fiendishly smoked various pure JWHs off of foil for months to the point of psychelia/borderline psychosis.
Not quite as much of a problem, but I fiendishly smoked various pure JWHs off of foil for months to the point of psychelia/borderline psychosis.