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Jessica Alba and Cash Warren ran over a photographer's foot while leaving Katsuya in Brentwood ... and it's all caught on tape!

After the couple get into their gunmetal grey BMW, they ignore questions from the paparazzi ... and after Jessica waves to fans and blows kisses, the car takes off from the parking lot. Cash clearly runs over the guys foot and seems to contemplate whether he is just going to take off. However, he does the right thing by stopping ... and hands over his personal info.

A witness at the scene tells X17online:

    "I couldn't believe that he ran over the poor guy. They obviously weren't paying attention. But Cash did give him his cell phone number. Jessica seemed completely unconcerned, but I'm not surprised."


Listen to Cash as he gets out of his car. He tells the injured photographer, who is not an X17 photographer, "You weren't limping a second ago."

Cash and Jess took off, but the photographer waited for the police and paramedics to arrive.