Why, fn f5? WHY?

[Rain Man]

I was giving a presentation today offsite, and I hooked up to their projector. I hadn't done that in a while and had to try a couple of times to find the fn f8 key to send the presentation to the projector.

Once I did, it popped up on the screen and all was well ... until I tried to open the presentation. My touchpad wouldn't work and the mouse was frozen. I tried restarting and everything else in the book, and no luck. I had to borrow someone's laptop and miraculously had put my presentation on a flash drive in my pocket five minutes before I went into the room, "just in case".

I gave the presentation, and on the train ride home was trying to figure out what had happened. Apparently when I was trying to hook up the computer with the projector, I had hit fn f5 as I fumbled around trying to find fn f8.

Fn f5 freezes your touchpad and mouse on my computer. It does nothing else. It just makes your touchpad and mouse not work.

Why?

Why is there such a thing on my computer? Why do I have a key combo that basically breaks the most single critical control that I have? There's no reason for this. It exists only to humiliate me in public. Is there another key combo that makes the screen fall off? Is there a key combo that makes the space bar not work? THERE'S NO REASON FOR THIS! I WAS TRYING TO INSTILL A SENSE OF AWE INTO THESE PEOPLE AND NOW I LOOK LIKE A TECHMORONIC IDIOT!