I have even heard of deceased people who have "burped."
I met a guy a while back that worked at a funeral home. He was telling us all sorts of stories about dead people. My uncle used to work in the coroner's office and used to explain to me about the condition some bodies are in once they arrive. I sometimes watch "Family Plots," but the show is more focused on the family than body preparations. There was another show that came on a while back that dealt with body prep after death and it's a task that a woman like me could not handle.