My first husband had one, going north to Derby on the A38, just before the Burton on Trent turn off, whilst me and his parents were passengers in a Thames 15cwt van loaded up with mobile disco equipment. Front nearside - right in side front of me. Went v bumpy for about 3 seconds, he immediately took his foot off the accelerator and I was about to slide the door window open and hang out to have a look when there was, what I can only describe as, a F***ing big bang.
Just coasted to a (very bumpy, noisy) halt. And I've thanked my lucky stars for the last approx. 40 years, that I didn't have my head out of that window. We all got out onto the side verge, Dad and son got the jack tools and spare out, and changed it.
No panic, though have to say, his mom did blench - and I dunno what I looked like! We all needed a drink when we got up to Derby though!
I had to look up "blench" never heard that word before - thank you