You must have heard this story

Told to me a long time ago; somebody phoned up the service centre and said 'we had an earthquake, and our fault tolerant box has fallen over'. Service guy; 'it can't fall over, it's a fault tolerant system'. Customer; 'No, no, it's still *running*, but it's fallen over on its side and we need someone to help us get it upright again' :-) :-) :-)