Motorist tried to overtake the lorry on A39 between Street and Glastonbury . It had been stuck behind 22-tonne HGV for 50mph after motorway . Driver misjudged gap as road narrowed and lost control of car at several miles . Nick Townley , 49 , who was driving lorry , captured moment on dash cam .
Motorist tried to overtake the lorry on A39 between Street and Glastonbury . It had been stuck behind 22-tonne HGV for several miles after motorway . Driver misjudged gap as road narrowed and lost control of car at 50mph . Nick Townley , 49 , who was driving lorry , captured moment on dash cam .