The long-running "feud" between Matt Damon and late-night TV host Jimmy Kimmel reached new heights earlier this month when Damon shot a video in which Kimmel's comedian girlfriend, Sarah Silverman, declared she was "fucking Matt Damon." Immediately after the Oscars last night, Kimmel fired back with a truly epic effort called "I'm fucking Ben Affleck," which included appearances from celebrities like Harrison Ford, Cameron Diaz, Don Cheadle, Robin Williams and Huey Lewis, to name just a few. The Kimmel-Damon fight is, of course, wholly manufactured, but at least has been consistently funny, starting with Kimmel's regular end-of-show gag, "Apologies to Matt Damon, we've run out of time," and extending through to Damon's on-air tantrum about getting bumped and two gags involving Kimmel's special correspondent, Guillermo. Kimmel's latest Ben Affleck video takes the joke to new lengths — and new heights in the art of free PR: