The hilarious dynamic duo recently went on The Daily Show with Jon Stewart to promote their new movie The Campaign, and not only did they share their on-screen jokes, but also some of their off-screen ones.
Will talks about Zach’s allergy to nuts, which was just enough of a temptation to pull off a prank on Zach by putting walnuts in one of his burritos.
He says that if the paramedics had arrived five minutes later, he would have died - but it's all just a hilarious spoof. Let's just say Jon Hamm even makes an appearance.
Check out the video above to see Will and Zach chat it up with Jon Stewart!