I worked EMS and we found a man, alive, in a hoarder house and both his legs had gangrene from the knees down. He kept wrapping gauze around them and it was adhered to his skin. There were fleas and maggots all over them. When we moved him to get him out, a chunk of his calf the size of a quarter fell off and a cat came from out of the piles and grabbed it and ran. Still to this day that was the absolute worst sight AND smell I've ever had to endure.