Is it really 20k calories??   We went to eat there and tried the 19,900-calorie Octuple Bypass Burger  Holy hell, it really is. So.. assuming we are counting 3.5k as a pound, that's an over-eat of 5.6 lbs. If that is ALL you have for the day (which, fatty gonna fat, you know they ate breakfast and lunch) and have a normal 2500 base... that's still 4.97 lbs over-eat. A normal week at 2500 is 17,500 calories. You would have to not eat for 8 days to make up for that one burger.