Well this one is rather specific and i will have to go into some rather detailed parts so if you're squeamish don't read further...
When i was about 15 i had an ingrown toenail that got removed 4 times, however every time it happened as my nail was growing back the wound hadn't healed, meaning its ingrown again. So i had one more operation to remove the nail AND the root so it wouldn't grow back. Which means removing the nail, and scraping the nail bed to stop it growing back. So i had this operation, and had to leave the bandage on for a week, as i'm sure you can deduce there would be a lot of blood, so the bandage was very thick and consisted of around 12 layers. So i went to the nurse at my local GP to have it removed, sadly i didn't know it was a trainee nurse. So anyway i went in and laid down while she started to undress it. As each layer went down until around the 6th it was getting stuck together, so she cut through it until it was about 2 layers left which was too stuck to move. Obviously i was "bricking it" and asked it to be soaked first. To which she got out a tiny sachet containing about 5 drops of water, she put that on and before she even took the empty sachet out her hand ripped it right off, a nail bed scraped to death and stuck with blood to a bandage....
Yeah that smarted a bit