Accidental deviation. What I wrote IS how I've remembered it apparently. Maybe because a battery horse makes more sense to me than a horse battery. Not sure. either way, I'll start using it as my password and see how long it takes to get pwned.
Oh, but the cartoon has the battery connected into the horse :)
What goes to show something, because most people discussing passphrases do not care to point that it's about mental images, not text. It's either so obvious that it doesn't have to be said, or so non-obvious that nobody gets it, even after reading the XKCD.
