Liu and Berlioz both do this. They do it as they go into tunnels, sometimes in the tunnel as they lay in wait for an unsuspecting fuzzy to come along, and when they enter the litterbox. Liu also plays Whirly-Bird. He loves this, really...Really! He's spread out on your forearm, legs firmly wrapped and clamped. His head is in your hand with the fingers holding it. You raise your arm up and down rapidly. His tail goes like mad. No other ferret I know likes this, and I really don't recommend it, as some ferrets do get motion sick. But Liu does enjoy it. [Posted in FML issue 2781]