Can you get super-sized from too much corn on the cob? This amusing, eye-opening documentary follows filmmaker college pals Ian Cheney and Curt Ellis as they travel to Greene, Iowa─where their ancestors once farmed─to embark on an agricultural odyssey. Cheney and Ellis review the many changes taking place in the sphere of food production, finding that some advances come with surprising costs. In the follow-up short "Big River," Cheney and Ellis take a canoe ride to chronicle the effects the farming industry is having on America's waterways. 90 min. Standard; Soundtrack: English Dolby Digital 5.1; deleted scenes; featurettes; music video; biographies; filmographies. Two-disc set.