In a police report, obtained by TMZ.com, authorities in Orange County claim James had to dodge Marcia Valentine's Mercedes as she "attempted three or four times" to hit the TV motor mechanic.
Cops also claim Valentine "laid in the driveway and wouldn't move."
Neither Bullock nor her husband was hurt in the attack.
Valentine allegedly drove off before sheriff's deputies arrived on the scene. Police tracked her down on Monday and took her into custody.
Valentine is being held on suspicion of assault with a deadly weapon.
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