i work in I.T - when someones computer goes down - the world is over.
We had a client tell us, that becuase their computer didnt work (ie... they couldnt print) they lost $15 million dollars in 3 days... load of shit.
I have been threatened with my legs being broken and the whole lot.
People somehow dont understand that they aren't our only customer - just like them - there is more than 1 person asking for things to be done.
The ones that rant and rave - i normally delay them as much as possible
In general - customers suck.