MODEL RELEASED. Cannabis joint and crack pipe. Man sitting behind a table containing a home-made crack pipe (modified plastic bottle) and dish of skunk with a joint in it. Crack is the street name for a chemically purified form of cocaine. The drug is smoked rather than snorted and so enters the blood stream very quickly. Crack cocaine is a stimulant and produces feeling of euphoria. It is highly addictive. Skunk is a highly potent strain of cannabis. The dried leaves and flower heads of the cannabis plant (Cannabis sativa) contain the psychoactive drug tetrahydrocannabinol (THC), which when smoked or eaten produces feelings of relaxation, elation and altered perception.