Mad magazine and ad agency Serviceplan in Germany have revived the Economist "light bulb" people sensor poster from way back in a spoof sure to make all adgrunts giggle a little. See, in the Economist poster, the light bulb came on when a person passed underneath it. In the MAD version, it shuts off. Har har har! A bit self-referental for my taste, but advertising people are probably the only consumer group who still buy Mad magazine and old Far Side cartoons so I'll let it slide. ;)