41 years ago one of my brothers was messing about (with permission) with the farm’s step-through Honda 90 agricultural motorbike and damaged a shoulder when he came off the thing in the paddock where all the volcanic rocks from other paddocks had been dumped.
Our parents were away on a rare weekend off, so we called the neighbouring farm & got him to the local hospital at a ridiculous pace for those narrow, windy roads.
Two months ago that same brother bought a 1980 Vespa scooter & came off it in his gravel driveway, damaging his other shoulder in the process. He’s had a successful operation to fix it.
I couldn’t help reminding him about his awkward relationship between shoulders & powered two-wheeled conveyances.