Steve Martin is really sticking to this banjo thing, isn’t he? Kermit the Frog’s floppy muppet fingers are surprisingly not too bad on the instrument, either. Watch the boys play the tune made most famous by Deliverance, just one in a series of videos promoting Matt Hoyle’s upcoming book, Comic Genius: Portraits of Funny People. Other videos will feature (as the book does) Tina Fey, Robin Williams, Chevy Chase, Cloris Leachman, Weird Al Yankovic, Jason Bateman, Eric Stonestreet, Jane Lynch, Patton Oswalt, and Neil Patrick Harris (whose adorable Buster Keaton tribute is already on Funny or Die).