The driver searched frantically in her purse for a while and finally said to the blonde policewoman: "What does a driver's license look like?"
Irritated, the blonde cop said: "You dummy, it's got your picture on it!"
The blonde driver frantically searched her purse again and found a small, rectangular mirror down at the bottom.
She held it up to her face and said: "Aha! This must be my driver's license", and handed it to the blonde policewoman.
The blonde cop looked in the mirror, handed it back to the driver and said: "You're free to go. And, if I had known you were a police officer too, we could have avoided all of this."