You are currently on the third floor. Your best bet is to take the stairwell.

Hold the door, it may be a fire! — or — Crouch in a corner and hope it passes.

Don't forget to put on your fire helmet, which you should have been wearing at all times.

Use the fire extinguisher, but not too hard. — or — Run away from the fire.

This has been a simulation of an evacuation drill. Please report any irregularities to your supervisor.