It is the middle of the night in the middle of nowhere, two cars both slightly cross over the white line in the centre of the road. They collide and a fair amount of damage is done, miraculously neither driver is hurt.
They both get out. One is a doctor, one is a lawyer. The lawyer calls the police on his cell phone and they say they will be there within 20 minutes.
It's cold and damp, and both men are shaken up. The lawyer offers the doctor a drink of brandy from his hip flask, the doctor accepts, drinks and hands it back to the lawyer, who then puts it away.
"Aren't you going to have a drink?" the doctor says.
"AFTER the police get here." replies the lawyer.