Footage recorded by Lynn on her mobile phone shows the passenger exit his car before walking over to her vehicle amid busy southbound traffic about 3.30pm on October 19.“I held my phone up but he just kept walking towards me,” the woman said.“He threw something at the windscreen and was yelling so I checked my doors were locked.”The incident, which lasted about 20 seconds, then took another scary turn when the man punched through the driver’s side window, showering the frightened woman in glass.The blow was so strong Lynn said shattered glass became lodged in her arm.The man can be heard yelling expletives and accusing her of cutting them off. He also says that he has kids in the car.“He kept yelling at me to give him the phone, but by then I’d thrown it onto the floor of the car,” she said.“I don’t think he was hitting me but he was trying to grab me. I was leaning as far away from him as I could.”The man eventually returned to his car and was driven off. In shock, the grandmother did not know what to do next. “The window was completely disintegrated,” she said. “I had glass in my arm.“That’s when I realised the whole left lane was at a standstill.”She eventually drove herself home before filing a police report. No charges have been laid but Mandurah police say inquiries are continuing.If you have any information about the attack, contact Crime Stoppers by calling 1800 333 000 or via https://www.crimestopperswa.com.au/