Years ago, I went to stay with a friend of my parents, a Philadelphia trial attorney. After we got out of his magnificent Cadillac (all fins and chrome) to see the courts in action, he flicked a switch under one of the front headlights.

"That electrifies the body. Great anti-theft device", he said.

I asked him whether he would be in trouble if someone got an electric shock.

"Only if it's another trial attorney."