Will Ferrell is hilarious. His cowbell skit for "Don't fear the reaper" has become a classic music joke the likes of Spinal Tap fare. Anyways, when Queens of the Stone Age started playing "little sister" (which has an overly repetative jamblock intro) it only seemed natural for Ferrell to bust out the cowbell. Sure enough midway into the song, Ferrell was there in full costume with cowbell in hand. Totally hilarious, and now I'll never hear "Little Sister" again without thinking of Ferrell, BOC, and that cowbell.