Is this a BC glitch?

I was playing around with BC and I don't know if this has been done before or if it's a glitch. It's pretty cool either way.

Upside down walls:
http://i61.tinypic.com/2mn5gzo.png


Mini Walls:
http://i62.tinypic.com/1zoktih.png

Thread moved from 'Habbo In General' by Ripieno (Forum Moderator): as I feel it's more suited here

How did you do that? :O

People have been doing this for months :P