On Thursday, Jimmy Kimmel brought out Jennifer Garner, George Clooney, and Cate Blanchett for another round of his show's regular segment "Celebrities Read Mean Tweets," and things got a little silly. Jennifer, in particular, could barely stifle her laughter when one mean Twitter user likened her to a duck's private parts. However, things took a turn when Matt Damon (aka Jimmy Kimmel's fake enemy) took the hot seat to read a particularly nasty tweet that came from someone he knows very well. Watch what happens above, and remember: #NoDisrespectToBenAffleck.