Talk:Observer/@comment-28157752-20160504064339/@comment-25014034-20160504095249

The Block is related to a a concept in Minecraft called 'BUD' (Block Update Detection). You can try it out too- Take a Piston and set the block next to it on Fire. The Piston will activate.

 Darth wikia25 ( Contact Me ) 09:52, May 4, 2016 (UTC)