Peyton Manning can't stand how loudly Eli eats chips

We've got a sneak preview of the upcoming NFL Films documentary "The Timeline: Peyton Manning’s Summer School," and it appears to contain some classic Peyton-Eli brotherly bickering. As most siblings know, sometimes all it takes to spark a brawl is loud munching.

"Summer School" looks behind the scenes at Peyton's workouts and film study prior to his 2013 season -- his second in Denver, when he shattered the single-season record for TD passes with 55 and and threw for 5,477 yards.

We'll see how much screen time Eli gets, but here's hoping there's ample wet willies and kicks to the rear.