The guy is regretting his decision to go for 60 days.
Boy. There's a surprise.

"The Washington state man who's on a 60-day all-potato diet wishes he had set a goal of one month instead of two. Chris Voigt told the Tri-City Herald that — as good and healthy as potatoes are — there's only so many ways they can be prepared. And, about halfway through his tuber diet, which began Oct. 1, he's had them boiled, baked, steamed, grilled, fried, marinated and mashed."