Okay, so I can't think of a time that could better use a dose of the world playing beautifully together. And nobody says it like lolcheerio33 in the comments for this video: "It's not a Youtube Symphony without a toy piano, a saw, a beat-boxer, and a storm trooper."
The whole world / Internet Symphony No. 1: Eroica
I can't decide if my favorite is the little-ittle girl behind the timpani or the en masse harp glissando at 2:50. No idea when the next open auditions are, but I figure I should start getting Abbey in shape now.