In 1976 in Korea, I was offered and smoked what were called OJs--opium joints. They looked just like a rolled joint except that they had been dipped into opium tar, making them mondo sticky, and then dipped again into some dank asian pot. So the appearance was ajoint that had pot on the inside AND sticking to the outside. To this day, I have never smoked anything stronger. A single OJ would get 4 of us super stoned for half a day.