You never change the pilot halfway through a flight, says a clearly rattled David Lammy. Can’t he see that his party is in a tailspin? You never change the pilot halfway through a flight, says a clearly rattled David Lammy. Can’t he see that his party is in a tailspin? A couple of days ago on a Swiss flight from Seoul to Zurich, a pilot experienced a medical emergency . Three doctors on board assisted, one of the other pilots assumed the controls, and the plane ended up landing without harm to