I drive a 2006 Chevrolet Cobalt SS (front-wheel drive vehicle).
Periodically, during left-hand curves at highway speeds, my car will suddenly begin turning tighter than I'm asking it to. It's difficult to describe the feeling, and I'm not great with the terminology, so I use the word "oversteer."
Everything will be normal until the conditions are just right--sharp enough and fast enough. Then, without warning, my car will behave as if I suddenly tried to turn tighter.
It does not happen when I am turning right.
In case it matters: The last time I had my wheels balanced I was told that the ball joint on my right-front wheel was a little loose, and that it wasn't anything to be extremely concerned about, but that it might cause my tires to wear slightly unevenly.