The Derr Man has introduced to me a very awesome Minecraft video series called Minecraft Over Engineering, by a guy named St3venAU.

He takes a simple idea using redstone and creates it. Then, he keeps making it bigger and better, pushing Minecraft to the limit. The aim is to see how much it will take to make Minecraft lag horribly, whilst creating something absolutely amazing.

This is a relatively new series, so I am going to post all the videos here and keep updating this thread. This guy is truly amazing.