When you eat a big meal, you're probably eating a lot more than what your body is used to. Some sources say those heavy party dinners can range anywhere from 3000 to 4500 calories. That's quite a belly full of food. Here's what it looks like in 'everyday' food (hopefully you don't eat like this every day).
Imagine if instead of having different dishes at your party you just had to eat one thing over and over until you match the 3000 in calories. The horror! It would be unbelievably painful, because 3000 calories of pizza or wings or white bread is a stomach popping amount of food.
Greatist did the maths and found that 3000 calories is equivalent to 30 slices of white bread, 14 slices of Domino's pizza, 15 Krispy Kreme doughnuts and so on. I'm about to throw up thinking about all that food, but this is basically what we eat at any big dinner party.