The guys in Rush have given the thumbs up to this viral video that's been viewed almost five-million times. It shows a member of the Baltimore Ravens Marching Band at the game on Sunday air drumming along to "Tom Sawyer." Rush's account retweeted the clip and added, "The professor would approve," referring to drummer Neil Peart. We've included a clip of Rush doing Tom Sawyer live in Cleveland and the South park crew doing the song too.