The first time I cooked crack I was doing somebody a favour. Well, no, that’s not strictly true. The first time I watched  crack being cooked, I was helping somebody out.   When you work in a shop, people come and go. You get high schoolers who work weekends only to make some extra cash. You get those who jump from job to job, never finding a place to settle down. And you get people who come one day, work a week, then vanish as though they’d never existed to begin with. In sh