I get the same thing from my hch. It's a combination of the type of clothes you are wearing at the time, seat materials, and the low humidity of winter. Any car will also build up a static charge when driving at highway speeds and if you happen to pass some money to a toll taker, you run the risk of discharging a good jolt. To remedy this, you can attach a static strap to the rear of your car that will touch the ground as you come to a stop and discharge any static electricity that has accumulated.