With particles if you tap the particle it plays inside the editor.
We want to do more preview stuff like this.
We had movements at one point, but removed it before release because it was confusing and weird.
X@Idow373 i just realized it only posts one of the 4 images so I'll link the rest here!
http://m.imgur.com/JU3HbGc
http://m.imgur.com/lyVPo3i
http://m.imgur.com/Niav4Si
Yeah the message button in the hub is discontinued, and something we keep meaning to remove but always forget.
Instead use the forums message/chat feature.