Matt Damon Does His Matthew McConaughey Impression 8.25K Lauren Herstik 10/14/10 08:50AM Filed to: The Late Show The Late Show Matt Damon David Letterman TV Video Noted celebrity impressionist Matt Damon briefly appears as Matthew Mcconaughey on the Late Show. Things get all too real when he offers to send David a picture of his penis via email.[There was a video here]