21.   The sturdy sensors detect vibrations and sounds.

22.   The sensors detect changes in electrical charges in the cells that can be associated with the development of cancer.

23.   Twin roll bars pop up behind the rear head restraints if a sensor detects that the car may roll over.

24.   When a sensor detects a loss of air, it triggers a warning light on the instrument panel indicating which tire is low.

25.   When a sensor detects the presence of bright light, the charge darkens the surface of the mirror.

26.   When sensors detect that any wheel is slipping, torque is directed to the other wheels.

27.   When sensors detect the wheels slipping, a computer begins to restrict the flow of fuel while applying progressive brake pressure, helping the driver to maintain control.

28.   When the sensor -- which is positioned on the floor -- detects moisture, it sets off an ear-splitting alarm.

29.   When you make a nighttime visit to the commode, a motion sensor detects your movement and switches on a nightlight.

30.   Buick will offer an optional all-wheel-drive system that engages automatically when sensors detect a loss of traction.