I suppose if I had only 1 or 2 cats, this sort of behavior would be seen, however, since there are so many in the house, any playing is usually with another, often unwilling, playmate. . I have seen them go "feral" once in a while, where their eyes are dialated, and they jump and run at anything, as though they are on catnip. Yet, when this type of behavior is shown, it seem to permeate through the entire pride, or at least through some of them. (Maybe it is the Moon?)

.......wayne