Sprained my thumb.
The backstory that leads up to this includes that I am not too bright. We have a hardwood floors in part of the house, and the dog will try to run on them, and she just ends up running in place like a cartoon character or something and ends up running in place.
I was wearing socks, knowing I had a good slippery surface and I thought it would be a good opportunity to make my husband laugh by taking off running like the dog and doing that running in place thing. I tried to catch myself when I fell, and I guess my thumb was not designed to bear the amount of weight that I have in the fall. It didn't end well for me.
Yes I am 47 and I still do childish things, and pay the price. BUT at least I got a laugh out of him.