Anyone can model a car crash or lots of emergency services on their layout.  However, this would really stretch the viewers belief.

From the Daily Telegraph:

Last Wednesday, Mr Xiang was driving along the Chongqing-Guizhou Expressway in central China when he noticed a giant circular saw spinning at speed towards his windscreen.

The 5ft cutting blade collided with the car bonnet, ripping through its metal engine as Mr Xiang, whose first name has not been revealed, frantically wrestled the wheel of the swerving vehicle. Miraculously, the bouncing blade missed the driver, wedging itself 50cm deep into the front of his JMC truck.  Mr Xiang defied the odds by walking away from the crash with barely a scratch on him.”I heard a ‘bang’ and then I saw all the white smoke in front of me. I almost lost control of my car,” Mr Xiang told local reporters the day after the incident, still visibly shaken up by the encounter.

Remember the vehicle is left-hand drive!  The article concludes:

Road injuries are the third-leading cause of death in China, ahead of cancers, according to a global study in The Lancet medical journal from 2013.

I’m not surprised!