CHP is reviewing this video of a group of dirt bikers attacking a motorist on a San Francisco freeway during an illegal "sideshow." The victim was taken to the hospital.
About 15 people on dirt bikes and ATVs were doing wheelies and other stunts across all lanes of southbound Highway 101 on Wednesday.
Someone in the group hit a Toyota near the Cesar Chavez exit.
The driver confronted the bikers, and a fight broke out. The driver was punched and kicked, and the bikers rode off.