A new partnership between Hoodline and a free iPhone dashcam app called Nexar is already yielding some dramatic video content for the neighborhood news network.

The concept, admittedly a bit terrifying, has a noble goal: to "help promote safety awareness on local roads."

Here's our first example, then, of why you shouldn't make an illegal U-turn: You could knock someone off a scooter, break their foot, and end up on a blog (or worse!).

The accident took place on Friday, July 22, at Divisadero and Sacramento. The driver of the dashcam-equipped car says the scooter took a left at the very end of a green light, and, well...

Ouch. And was that a helmet that went flying?

Related: [Update] Mayor Announces 57 (Not So) New 'High Priority' Vision Zero Projects