I've recently run across, well, what I thought at the time, a massive 15 lb. burger that was beyond my comprehension to understand an answer for this very simple question, "why so fucking big?" Anyway, I got to noticing that the web page (http://money.cnn.com/2005/05/03/pf/biggest_burger/) that was speaking about this 15 lb. beefy monster of a sandwich, was dated way back in 2005. I thought, "yep, who knows how big they make 'em now."
Well, "Holy Hamburger Hell," I found a promotion for a (possibly the world's largest cheeseburger currently known to man) 123 lb. burger within minutes of my prior search!
You can find it here: http://www.seriouseats.com/2007/02/worlds-largest-burger.html
Holy cow-killing Cro-Magnon man! I enjoy devouring a big tasty burger with french fries and the works, but damn! What in the hell do you eat this 123 lb. hamburger with, a hatchet, axe, and a freshly sharpened machete? Ha-ha!
If you want to peruse the contents of the main "big burger" site (Denny's Beer Barrel Pub) that has many eating challenges along with freakish-sized burgers, visit: http://www.dennysbeerbarrelpub.com/
Please be advised (if you're feeling queasy), if you browse through Denny's website, you may run across some graphic images of utter glut! LOL!
I hear that Denny's Beer Barrel Pub also has some pretty damn good tasting regular-sized burgers along with a wide selection of beer "to go," so if you're near the area and are craving some burger bliss or are just thirsty for some good ol' beer, you may want to give this place a whirl.
I think I'll just take the beer for now, and after seeing all of this mass consumption of beef patties, I may stay on a liquid diet for the rest of the day. Cheers! Ha-ha!