Well the article doesn't mention where in Las Vegas this restaurant is. The restaurant is part of the Fremont Street Experience which is the "old Las Vegas" north of the main strip. The smaller of the burgers pictured above (single-bypass) is actually the best seller in the restaurant and a much more manageable size. With an order of Flatliner Fries and the Buttermilk Shake, you will still find yourself staggering out of the place.
For those who go to Las Vegas, I recommend that you park at the south end of the strip (near the MGM Grand or New York, New York) and walk everywhere. This will help you burn off those calories. Also, all that walking will keep you away from those slot machines a little big longer.