A trucker “pulls over” a cop for speeding and talking on his cellphone while driving on a wet road and reprimands him. The cop’s tone undergoes a dramatic change after he learns he was caught on the trucker’s dashboard camera. It’s then the trucker who does the interrogating, and the cop who makes the excuses. It’s really quite amazing.

Radley Balko blogs about criminal justice, the drug war and civil liberties for The Washington Post. He is the author of the book "Rise of the Warrior Cop: The Militarization of America's Police Forces."