“Who are these people? What do they experience? What do they feel?” So began another of those Channel 4 documentaries about people with unusual medical or psychological conditions. Watching it this time, though, was different; I am one of those people and I know how it feels. In Being Bipolar (4 March), a sympathetic psychotherapist called Philippa Perry set out to explore what was called “manic depression” in the bad old days. Manic depressives are now said to suffer from “bipolar I”, which sounds nicer, but is still just as alarming. You probably won’t have seen a person in the grip of florid mania on television before, but this programme showed us one.Paul, 54, had been an entrepreneur. When we met him, though, in a hotel/spa/golf course in the