Mark Duplass: There was something that we called the "sack tap" on "The League," which is what it sounds like. And if you're a fan of "The League," you just want to be in on the fun.

It’s the eternal question ever since the release of the 2014 found footage film, Creep. Duplass and director Patrick Brice created a terrifying killer who loves playing with his food, so to speak.

Jay Duplass, Mark Duplass, welcome to FRESH AIR. Your book is a lot about being brothers and both the beauty and the complications of being close and of working together.

Mark Duplass: There was something that we called the “sack tap” on “The League,” which is what it sounds like. And if you’re a fan of “The League,” you just want to be in on the fun.

Mark Duplass says he has come up with a “dream moment” for this year’s Emmy Awards — and it sounds more like a nightmare. The idea is that both he and his brother Jay are nominated in the ...