It's designed to make driving safer, particularly after a long day at work or a tiring road trip, but GM's haptic seat technology that lets you know when you start unintentionally changing lanes might be even scarier than the drift.
The system uses a windshield mounted camera to monitor the lines on the road when the vehicle is traveling faster than 35 miles per hour. And when it detects a lane change without the turn signal being used, it will cause the driver's seat to vibrate on either side so they know which direction they've started to drift and can immediately correct it. And as an added bonus, straddling two lanes with a vehicle could provide a relaxing massage, even if at the cost of enraged drivers around you. [GM]