<p>Dramatic dash cam footage shows the moment a large container separated from an HGV and narrowly avoided hitting drivers on a busy motorway.</p><p>Motorist Christine Luff captured the heart-stopping incident while driving on the M25 motorway just outside Potters Bar in Hertfordshire on April 22.</p><p>The 69-year-old from East Hunsbury in Northamptonshire was travelling on the busy road with her 89-year-old mother when the trailer carrying the 20-foot container became detached.</p>
