I had been living and working in bumfuck Kazakhstan for over a year, and I decided to take a 3 week vacation back in the States. In the States I basically spent the entire 3 weeks lounging around and eating all the food I missed so much from being overseas: pizza rolls, pizza hut, Doritos, steak and cheese subs, 5 Guys hamburgers and fries, etc. I literally ate almost nothing but junk food for 3 - 5 meals a day for a full 3 weeks. I went through at least 4, 90-count bags of pizza rolls, for example.
I left Kazakhstan at 185 and returned at 215.