I also get massive shocks from my car door too! Especially in the winters. I took the car to the garage because I thought there is some problem with the car. But the garage owner checked it and said everything is normal. Then I understood the problem must be with my body. But the saddest part is nobody believes me. So nowdays I touch my nails on the door 2 or 3 times before grabbing my car door. Everybody thinks I am crazy. But let them think anything. I don't want to get a electric shock like that. One night when I was outside the cafeteria and touched my car door there was a visible spark. The gateman saw it. I looked at him. He seemed very curious when I went towards him. Maybe he thought I must be some sort of electric man!