My last two KitchenAid mixers did this, too: as they got old, the on-off switch stopped being reliable. You could turn the darn thing off and it would simply keep going till it ran out of steam.
I found this out with the first one years ago when I had my hand down in the bowl and it must have been just enough movement that it toggled itself on and gave my wrist a compression fracture.
This one, as always a 5 qt size because at the time that was the biggest home-kitchen one they made (and because at this point I have all these extra bowls for that size), has been at that stage for about a year now. But it still runs, and it still turns off, if reluctantly, and I can always unplug it if need be. Haven’t needed to yet. I’ve been thinking for awhile now how replacing it would be a lot of yarn money.
I am typing this carefully. It was the top of the dough hook this time below my thumb. I knew better, that’s the thing, it was sheer stupidity on my part.
I figure if it’s broken I’ll know for sure tomorrow because it will hurt more then, but right now we’re on 8:30 pm curfew for ten days, Urgent Care is closed, and the ER is just not where anybody wants to be during a pandemic even if they’re separating suspected covid cases at triage, which they are. And I seem to be able to manage.
When Richard said by way of comforting that he really enjoyed that sourdough, it helped. A lot.
Edited to add in the morning: the pain is not more localized and it’s not sharper so it’s likely just bruising. Carry on!