Y93G2 Activity, grilling and smoking food
Y9286 Slaughter house as the place of occurrence of the external cause
Y6553 Performance of correct procedure (operation) on wrong side or body part
X962XXA Assault by letter bomb, initial encounter
X05XXXA Exposure to ignition or melting of nightwear, initial encounter
Ok, I kinda give up on the last one.
That's horrifying.
https://news.ycombinator.com/item?id=12773709
They do happen, but they're quite rare.
Step one of the operation was getting taken back to a patient room, being given an IV (since I was not to eat or drink for 12hours before the operation), and waiting. After a few hours, a nurse walked in with a sharpie and wrote "NO" on my other hand.
It wasn't comforting.