Doug Wilson's reminded me of my love for Bobby McFerrin. The man is just awesome. I even do the chest-slapping human drum thing too. People tell me it looks lame and sounds nothing like Bobby. I tell them 'Envy rots the bones' (Prov 14:30).
Anyway, here's three videos demonstrating the brilliance of McFerrin and the wonder of congregational singing. Pity the middle one is idolatry!