A teenaged driver was arrested at the height of yesterday's on Bike to Work Day commute, after police say that she intentionally struck a cyclist as he rode down Market Street.

According to the San Francisco Police Department, it was 4:55 p.m. Thursday when a 26-year-old male cyclist "got into a verbal argument" with an 18-year-old woman driving near the intersection of Fourth and Market Streets.

The cyclist "banged on the window" of the driver's red Hyundai Accent, police say, then passed the car and took his place in the lane in front of her.

The driver then ran the cyclist "over...with her vehicle" in what police characterize as an "Assault (Vehicle vs. Bicycle)."

The Ex reports that the collision occurred "before a gaggle of cyclists and other onlookers, as well as volunteers from the San Francisco Bicycle Coalition who were out and about for Bike to Work Day."

After hitting the cyclist, the Ex reports, the driver "walked behind her car to check on the cyclist", "moved the bicycle, then tried to run back to the driver’s seat" to flee, witnesses allege.

Her escape was thwarted by bystanders, who "grabbed the driver before she could get back to her car, and someone pulled her car door open," the Ex reports. Then "a 'good Samaritan' leapt into the car and grabbed the driver’s keys."

In response, witnesses say, the driver “grabbed her pink Taser and tried to Tase [him].”

As of publication time, SFist was unable to independently confirm the Ex's account of events with SFPD.

According to SFPD, the cyclist suffered a "fractured back and pelvis lacerations," and was transported to San Francisco General Hospital for treatment of those injuries, which police say are not life-threatening.

The driver was arrested at the scene, police say. A call to SFPD on what charges she was booked under was not returned at publication time.

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