Sooner or later, in a game like Grand Theft Auto IV where any car is up for grabs, those horseless carriages would naturally become sentient and choose to destroy their creators like in Maximum Overdrive. Naturally. But what would that look like? Luckily, there is a video of just that.
Apparently what is really happening is result of a PC mod taking away all of the friction of the vehicles, causing them to slip and slide like mad. I, for one, would be completely happy with Rock Star putting out an update for the consoles to play the game this way. They could even make a survival mode out of it.
Now all we need is a no-friction horse mod for Red Dead Redemption.