SAN FRANCISCO (CBS SF) – A bicyclist who allegedly attacked a Zipcar driver with his U-lock during last month’s Critical Mass event was charged Wednesday with four felonies, prosecutors said.

Ian Hespelt, 39, of San Francisco has been charged with assault, false imprisonment, vandalism and throwing dangerous objects at a vehicle, according to the San Francisco District Attorney’s Office.

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Warning: Video Contains Some Profane Language

The Aug. 28 attack was captured on video posted to YouTube. The video shows a confrontation between several bicyclists riding against traffic during the group bike ride. As one driver tries to get away from the crowd, one of the bicyclists smashes the side of the car with his bicycle lock.

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Police said the Zipcar sustained about $2,000 in damage.

Officers on patrol near Third Street and Terry Francois Boulevard spotted Hespelt, who was riding a bike similar to the one in the video and matched the description of the suspect, police said.

He was arrested and booked into jail. Hespelt is expected to be arraigned on the felony charges at 1:30 p.m. Thursday, prosecutors said.

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