Hmmm.... chalk this one up to random video cameo. French duo Herman Dune released a video for track "Tell Me Something I Don't Know" from his 2011 album Strange Moosic which features an adorable blue forest yeti &... John Hamm. Weird and awesome.
Herman Dune is an interesting musician. He makes catchy songs that are a bit too repetitive and slightly annoying but good-hearted and make you feel like things aren't so bad. Plus he definitely makes some entertaining videos.