While driving behind a truck and chatting on a cellphone, one motorist decides to make a stunningly dangerous left-hand turn, and just avoids crashing into oncoming traffic.

As a line of cars begins to form on both sides of the near-collision, one fed-up gentleman takes it upon himself to ensure that the woman behind the wheel thinks twice in the future before using her cellphone while operating a motor vehicle.

Say what you will about his method of persuasion, but it's undoubtedly more effective than a 35-minute PSA.

[H/T: Clip Nation]