I heard a story yesterday that made me chuckle, but also left me feeling a little unsettled. A friend's colleague quit work without warning a couple of weeks ago, effectively vanishing before he'd even explained why he was leaving. This sort of event can be pretty worrying for co-workers, particularly during a recession (was he laid off? does he know something we don't know?). So it must have been something of a relief for his colleagues when they saw an email from him appear in their work inbox