The Easy Trigger Fire Extinguisher hardly requires the tutorial that most flame retardants need in order to be properly employed. There's no pesky pin, just simply the removal of a clearly labeled safety lock that exposes its activation button.
Moon Woojung and Shim Wonbo's life-saving submission for the 2012 iF Design Talents is a reworking of the common cylindrical canister, providing a much more compact and portable object that can be efficiently stored, carried and deployed.
This slim rectangular device might usually be mounted on the wall of a building and removed quickly in the event of an emergency. An obvious red arrow suggests that the inner handle should be yanked from the Easy Trigger Fire Extinguisher before a simple squeezing action sends foam through the attached black tube.