So wot your saying you was coming off a roundabout and the back end came round it and it was wet and you was doing about 40 . Your beam will be bent 100% the wish bone will stand a good chance of being bent . Have a good look at the door gaps on both sides and all so have a good look at the tail gate gaps as the rear of the saffs are not the strongest . And I no of 2 saffs that end up on jigs from doing the same as you have done