(Ghastly) Krueger
I was going to use a picture of the boring old "jaws of life" but then I remembered about this little doohicky.
This is a TIC (thermal imaging camera) also nicknamed "The Eyes". It registers differences in temperatures to make a picture. So it can be used to find a person in a smoky, pitch black room or to find a fire burning behind a wall.
Notice how my face is very light, my hair a little darker, my shirt collar even darker and the wall of the truck almost black? Warmer something is, lighter it is. If something is ridiculously hot, it will appear red.
Also notice the green bar on the side of the display? That shows the temperature at the cross hair little green dot (presently on my nose). So we can use that to look for hot spots in a wall where a fire had burned previously.
The screen is "live" so the image changes as you move like a video camera. A couple drawbacks are : if you get in a really hot environment, a bit of lag develops, in a really smoky room, you can't even see the screen even if it is only a couple inches from you face and it can't see through glass (it just looks black).
There you go, that's the TIC!