The AF447 accident seems to have more than a few similarities with a lesser recent incident on the London Underground
Rail Accident Investigation: Report 13/2012
Simplistically, a train managed to depart a station into the tunnel with the doors open.
Now of course, that's interlocked multiple different ways to be impossible ...... but a whole range of failures and difficulties over the previous 10 minutes, brand-new, all-electronic, latest-technology train, recent software updates, inadequate and conflicting error messages, misunderstood and rarely used manual overrides, etc, culminated in the driver (who normally does nothing more than oversee the automatics) of several years experience losing situational awareness.
Sound familiar ?