Hello Boo, Yeah I remember our little female mini nox doing something very similar and we handled it by ignoring. It did take a while, but we did the sticking her on the floor thing and standing up so it was physically impossible for her to do it again, then distracting with something really nice or interesting and eventually after a few weeks it just disappeared, but like your ittle one it used to properly amuse her, used to laugh her head off.She was about 20 months old at the time if i recall, so as you've identified, just a phase.