Two thugs threatened a man with a knife before kicking him out of his BMW.
The 46-year-old victim was taking the men for a test drive in his car, on June 14, when one pulled out a knife and held it to his neck.
They forced the him to get out the vehicle in Romilly Drive, Carpenders Park, but he grabbed his keys from the ignition and ran away (below).
The driver suffered a cut to his hip and required seven stitches.
Police have just released CCTV footage of two people they would like to speak to in connection with the incident.
PC Chloe Palmer, from the local crime unit, said: “Thankfully the victim is recovering well from his injury but this was obviously a frightening ordeal for him."
Anyone with information should contact Hertfordshire Constabulary on 101.
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