LEGO fan and flickr.com user Kale Frost a.k.a. Frost Bricks recently shared this colorful and great mech named Lex Mech in his photostream. The MOC' features Lex Luthor character, a famous villain in Superman cartoons and comics. The color-scheme of the mech is based on the armor-suit of Lex Luthor but the MOC's scale is much bigger than the original versions. I liked very much the usage of different hero-factory and/or bionicle pieces around the Mech as well as transparent neon-green pieces. 

LEGO Fan and flickr.com member Jonas a.k.a. Legopard built another great MOC, District 9 Exosuit for the Ironbuilder Challenge against Tim Schwalfenberg. He shared this great Exo-suit from the movie District 9 (2009).  The mechanical, salvaged look and texturing is outstanding at this MOC. I especially liked the head section of this. The weapons and the joints are also built very well.