Very Common occurrence over here,happens to me at least two or three times a week for absolutely no reason,some people think your following to closely,others think because they are a car they have right of way when merging,others just think it is funny to F#*k with Trucks,sadly their not thinking at all,just in my HGV with my permits,with a single trailer I can be up to 52 Tonnes,with dual trailers can be up to 120 Tonne.
Now I know who I'd back when something goes wrong between a 2 tonne car and a truck up to possibly 120 tonne,not sure about England but here if your over 17 you can walk in an get a license,there's a lot of people over here that can neither Read,Speak or talk English and their out there driving on our roads,so many idiots and not many decent drivers pout there anymore