These two I did on the wall of my old house in the first year, I was sad to paint over them, but I needed the deposit. As it turned out though, I painted over them with gloss paint, and so had to
sand them down and then coat all four whole walls with emulsion. That was balls.
Oh and the first one is not a reference to the twin towers, unless you think that's particularly brilliant. Shiny things go to whoever can spot which feature-length anime the robot appears in.