Don't laugh too much, it could and has happend.

The documents refer to "eating people as an after-dinner snack ... barbecuing people’s livers ... banqueting on human meat." Several episodes of this are also recounted: "On May 14th, 1968, a group of 11, led by the Wei brothers captured a man named Chen Guorong and killed him with a big knife before cutting out his liver. They shared the human meat with 20 participants."

http://www.lewrockwell.com/orig/young1.html

Best,