M.C. Escher Was Here
Depending on where you are from, building safety standards are often held in high regard. In the chance of an emergency, you want to make sure that everyone that is in the building has a good way of getting out if need be. Even if the way out is a little creative.
When it comes to optical illusions, artist M.C. Escher is your guy, and what better way to incorporate building safety than by providing an optical illusion to go with it, huh? Just kidding, that sounds like a terrible idea but this emergency exit seems like it leads to nowhere.