At least, the hide head of my Thor rawhide and copper hammer did. I went into the garage today and the head was lying on the floor. I've been able for several years to spin it round in its socket, but not remove it, so I've always imagined that some kind of clip in a groove was involved, but no. The socket is parallel, and smooth sided. So, is it a case of it has dried out and shrunk, and if so, will soaking it in water or some other fluid help to secure it?
Steve