What you see above you are two men singing into a microphone together. To be a little more specific, it’s Sir Paul McCartney and Dave Grohl. To be even more specific, they’re singing “Helter Skelter” to each other … using the same microphone. This happened. In addition to reminding us that not everything cool yesterday happened in Chicago, this all went down last night at Paul McCartney’s show in Seattle, where he had the remaining members of Nirvana up on stage to help him play for seven songs (which was only a fraction of McCartney’s 39 song setlist!). Check out these fan videos below.