Negra explicación

Now, this is really quite simple, ok? Understeer works like this: [moving a model of a Ford Focus in a straight line] you drive down the road, turn the [steering] wheel, but the car goes straight on, crashes into a tree and you die. OVERsteer works like this: [moving a model of a BMW series 3] you drive down the same bit of road, turn the wheel, but the back of the car comes round like this [showing how the car fishtails 180 degrees], and you go off the road, crash into a tree and you die. Now, oversteer is best, because you don't see the tree that kills you.

Richard Hammond - Top Gear, Series 2, 2.5