This is an animation bug that only shows up when viewing network players. It's not something you can "do" such that you see yourself doing it.
It's a graphical glitch, if you sit, then walk, it will show to other people as you floating in s sitting position.it gets fixed if you jump.EDIT:Damn it Badspot beat me to it
Moonwalk? Oh, do you mean when your Blockhead is moving without pressing any buttons?
Please make this a built-in function, and do the same with the "moonwalk" glicth.
How do you sit, but still move around without walking?
Yes, adding the ability to press a button for dryhump and moonwalk would be great :D.This, I don't know.