Back at Carnegie Mellon several of the buildings were built into hills, presenting major conundrums with floor numbering. The ground floor entrance on one side of the building would be on a different floor from the entrance on the other side. And there was no consistent solution to this problem. For example, in one building (the computer science building, incidentally) the lowest floor was 1, and you were entering the fourth floor when you walk in the door from the main campus. In another building, the highest entrance floor was 1, and you entered B3 if you're coming in from the other side.
And then there was one building that was slanted! The office building in 'Being John Malcovich' had nothing on us.
And then there was one building that was slanted! The office building in 'Being John Malcovich' had nothing on us.