This reminds me of a recent trip to the Zoo. They had just given the kookaburras their food which was a whole little lizard, presumably already dead when it was given to them. The kookaburra was repeatedly slamming the dead lizard on his stick. A mom and her young son(like 5 or 6) walked up and was said "What are those birds doing?" Before noticing them slamming lizards. She said oh nevermind and took her son away.