I don't have an answer for you but I can relate. My cat does the same thing when I'm finished playing and he is not. Fortunately my cat is a gentle biter and has never drawn blood. He does calm down rather quickly and doesn't persist for long. I would imagine that this is more of a problem with single cat owners because cats with cat companions can chase each other around to exercise their hunting instincts. I would be curious to know what others think as well.