[b-] Bart Simpson is [2] inside the lobby of the [-o] office building where he is making an 膊 arm to play pranks on the office workers with. He uses a 寸 caliper to take apart a 甫 trellis to form the two bones for the 膊 arm, and then connects them together with a miniature 月 moon to serve as a flexible joint for the 膊 arm. Then when office workers comes into the lobby he throws the 膊 arm at them to frighten them.