Road Rage of the Day: Critical Mass Cyclists Surround Car, Break Window With U-Lock

Prepare yourself for some serious secondhand rage.

This video shows a group known as Critical Mass, an international cyclist advocacy group, driving into oncoming traffic on the wrong side of the road in San Francisco.

One cyclist slowing inches his way toward a Zipcar and practically throws himself on the bumper.

"You f*cking hit my bike!" he shouts, as other cyclists surround the car and yell at the driver. The driver, obviously threatened, pulls away and tries to escape before a cyclist hits the car multiple times with a U-lock.

The group's website encourages cyclists to "remember that pleasure and friendliness are more subversive than anger and blaming."

Well, somehow this gang didn't get the message.