I ate around 10,000 calories yesterday...effects?

I totally took an off day and pigged out yesterday, I was skiing so I had a huge breakfast, lunch, snack, and dinner, and skiied/ran in between.... I'm guessing it was around or over 10,000 calories as I devoured candy bars, peanut er, brownies, doughnuts, trail mix, etc the entire day... I know I expended alot, say 3-4,000, but not nearly as much as I ate. How much of that am I actually going to gain? Will I bank 6,000 or so calories in fat, almost 2 pounds? Has anyone else ever done anything like that?