In honor of his two-year anniversary as a late-night host, Jimmy Fallon unveiled his very own flavor of Ben & Jerry's earlier this week. While presenting his Late Night Snack, he also took a shot at Stephen Colbert's signature flavor, The Americone Dream. Well, Fallon's comments didn't fall on deaf ears, and Colbert made his counter-attack on The Colbert Report. When Jimmy showed up to defend himself, the late-night cohorts could barely contain their laughter as an all-out ice cream battle ensued. Check it out (but be warned: if you're anything like me, it might give you a craving for Ben & Jerry's).