I have to admit I was doubtful at first but there are widespread reports of a 59 year old man in Sichuan, China dying from injuries suffered when his buddies shoved a live 20-inch long Asian eel into butt hole as a prank when he was drunk. By the time they took him to the hospital, he was already bleeding and the eel had apparently started eating away at his intestines. He languished in the hospital for 10 days before finally succumbing to his injuries and infection. Reportedly, he was a chef which may explain the easy access to an eel. The eel did not survive.
If you read Chinese, here is the original report from China News.