1 {scene: in cyberspace}
1 Spanners: Okay, let me just adjust this switch here...
2 {scene change: still in cyberspace, but the colours are now reversed}
3 Paris: What happened!?
3 Spanners: The chromaticity feeds to our neural interfaces have been reverse polarised.
4 Paris: This is terrible!
4 Iki Piki: Don't be so negative.

Way back in the Dark Ages, cameras used to have this strange stuff in them called film. When you took a photo, the light hit the film and it recorded the image. Then you'd have to take the film to a business that used to be known as a photo developer, where you would have to pay money for them to take your film and turn it into photographic prints on paper. And you'd have to buy more film for your next lot of photos. And one film could only store up to 36 photos on it. And you couldn't download them off the film and if you wanted to put photos of your cat on your web site you had to scan them in!

Geez, we were bloody crazy back then.

Anyway, the most common sort of film actually stored the photo with all the colours reversed, as a negative image. How wacky is that?