Or does it mean I can only use it if I’m on fire? Rather limited kind of fire escape.
You may only exit through said door if you are, in fact on fire.
if the door and yourself are on fire may you exit but only then!
So if you jump on fire, then you may use door. Who is Fire?
this sums up the humor regarding funny signs. What was intended was the door was only to be used as a fire escape in the event of the building catching fire, but as worded means either only to be used if the door is on fire, or by a person on fire
I had to catch on fire before I could escape.
You may use this door if you are walking on hot coals at the time. However, you must spread the burning coals through the doorway in order to then be allowed to proceed through that doorway yourself. Of course.
And since you are in the city of Phoenix, if you opt instead to practice self-immolation in order to use the exit, it is to be hoped that you will be reborn from the ashes.
It means if the building is on fire you can use the exit