Hm, interesting question.  First, here’s what a grease fire is.  It’s when a container or pan of cooking oil or fat has become hot enough to ignite, and it’s now burning.  If it’s a pan that’s at least partially covered in food, the flames may be visible as blue or green or just as a very hot flame.  A grease fire is much more dangerous than a typical home fire, since it’s more likely to generate a large amount of smoke, especially if it’s in a closed space.  It’s extremely important to get the fire out quickly, but also to avoid getting burned by it.  I could talk about what equipment and techniques I think are best to do this, but what I’d actually like to know is how you think you’d do it?
assistant
Ooh, wow!  I mean, I'm not sure if you were serious or if that was some sort of hypothetical question... but I do know how to put out a grease fire.  Here's a very quick video on the subject:

You can also just go to google and type in “putting out a grease fire”, and you'll see how to do it, there are plenty of videos on the internet with instructions, so maybe just do some searches around for that.
assistant
What should you do if there's a grease fire?
user