A delivery driver was dragged 30 yards along the road after attempting to stop a thief from stealing her car.
The victim escaped her ordeal with just bruising and grazes after a crook jumped into her vehicle while she took an order to a house in Eccleston.
Detectives say she had left the engine of her red Audi A4 running when a man in his 20s, wearing nothing but a pair of shorts, struck and started to drive off.
However, the tenacious driver, who is in her 30s, grabbed hold of the passenger door and clung on as the thief sped off along Houghtons Lane.
In a bid to force her to let go, the callous lout even veered into bushes but she refused and her intervention eventually forced the offender to pull over and flee the scene.
The incident happened just after noon last Thursday (July 10).
The offender is described as white, around 6ft tall of an athletic build. At the time of the incident, he was wearing a pair of shorts.
DC Jeff Huxley said: “Merseyside Police takes incidents of this nature extremely seriously and we appeal to anyone with any information to come forward so we can take robust action against the person responsible.
“I would like to this opportunity to remind people that incidents such as this are rare, but if you find yourself victim to this type of crime make sure you put your own safety first, before that of your property.
“I would appeal to anyone who may have seen something, or who has information which could help us with our inquiries, to contact us.”
Anyone with information should call St Helens CID on 0151 777 6842 or Crimestoppers on 0800 555 111.