She sat in the backseat of a Porsche convertible, looking at her cell phone while her friend was inside a gas station.
That's when a man ran up, grabbed her purse after a brief struggle and took off running.
The whole incident — which happened at about 11:40 p.m. July 25 at Shell Gas Station, 5402 Biscayne Blvd. — was captured on surveillance cameras.
Miami police are hoping the video will help detectives identify the man. The video shows a man with short hair, wearing a long- sleeve sweater and a black hat with a white emblem, grab the bag from the woman. The force caused the purse strap to break.
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The stunned woman remained in the car and tried to get help.
Meanwhile, the man headed westbound on Northeast 54th Street.
Anyone with information is asked to call Miami-Dade Crime Stoppers at 305-471-TIPS (8477).