we used to live in acomb, not a bad place.I don't think I was even doing those speeds. I'd just entered a roundabout (A64, York) from standstill, so was maybe doing 20 or so. Luckily traffic was light that day, so the only thing damaged was my pride.
These things are very sensitive. Even a slight over inflation of the tyres makes a very noticeable difference in ride quality.