As soon as they find out what it is, the tabloids are going to freak out about dabbing. This new technique for getting stoned involves people heating a pinhead of super-concentrated cannabis oil with a blowtorch, then inhaling it through a glass pipe. For detractors, it’s known as “cannabis crack”. Even seasoned smokers are surprised by the strength. Street cannabis has around a 15% concentration of tetrahydrocannabinol (THC), the primary psychoactive ingredient. A dab has up to 90%.