I have believe I have observed being able to position oneself so as to cause a floating avatar to bounce between the perch and the ground. I have also found one can share a perch with a floating avatar. This does not seem to be appreciated by those already on the floating perch. Floating heads without bodies (or persons with special invisible body suits) is also something of interest to me. I have observed all of these capabilities.
i think it depends on your server, and system. i can never do the floating things lol