I eat like a horse on carb-ups. I disregard fat, protein and just make sure I get alot of carbs. I drank 12 cokes in a day and a half last week. Mac and cheese etc...
It's only one day, and if 1pd of fat is 3500 cals... Then I don't even come close to gaining a pound that day.
And it gives me something to look forward to, while I'm eating meat and cheese all damn day.