... These three blokes are sitting in a room smoking pot. After a few joints they run out of cannabis, so one of the blokes stands up and says, "Look, we've got loads of tobacco - I'll just nip into the kitchen and make one of my speciality spliffs." So he goes into the kitchen, grabs some cumin, turmeric and a couple of other spices, grinds them up and then rolls them into a spliff. Then he goes back into the other room and hands it to one of his smoking partners who lights it and takes a long drag. Within seconds he passes out. After ten minutes he's still out cold, so they decide to take him to hospital. When they get there, he's wheeled away into Intensive Care. A few minutes later the doctor returns and asks, "So what was he doing then? Cannabis?" "Well, sort of," replies one of the blokes. "But we ran out of gear, so I made a homemade spliff." "Oh," says the doctor. "What did you put in it?" "Um, a bit of cumin, some turmeric and a couple of other spices." The doctor sighs. "Well, that explains it." "Why, what's wrong with him?" asks the bloke.