Two hells that made me ROTFL.
The first, a piece of graffiti written exactly halfway across the Massachusetts Avenue bridge that leads to MIT.
The second, Sun's surprisingly aggressive advertising campaign for their new x64 servers against Dell (click on the image to download a high-quality PDF of the ad). In fact, they had even more outrageous ads that were censored by publications. And they're not stopping there either... they're inviting more provocative ad headlines by e-mail!