"Fire! Fire!" Following the procedure you rehearsed endlessly - and at the most inconvenient times - you run to the escape map to find out where in the building you are located (officially), only to discover that you are here and there. In your slightly panicked state of mind you see on the map that you are in fact in two places at once. So either you are experiencing an out-of-body experience, or someone screwed up while drawing the map. And to add to that they chose a high-gloss finishing to protect the map, making it even more unreadable.
Two things you definitely want to make easy to use: stuff you use a lot and that will drive you crazy if you have to do a cumbersome task again and again (think mobile phone, ticket machine), and those things you only use once but then under highly critical circumstances (think emergency brack, warning lights in a car).
Thanks to Frederic for the tip.