It seems that Denny's Beer Barrel pub has expanded it's line of hamburgers since the last time I took a look at the site. In addition to the traditional 3lb and 6lb burgers, they are now offering a 15lb hamburger. And if that wasn't enough, they came up with a 100lb burger for a charity event and are planning on offering it on the menu for 199GBP, or about $400.
Who in crap would order a 100lb burger!
http://www.offroaders.com/album/clearfield/clear06092006/index5.html