Respect the presentation. The right thing to do when a band is playing. But how about when a band member intersects with kids cutting in between?
“Tuba player trips kid cutting through formation.”
Image courtesy of http://thechive.com/2010/10/22/proper-ownage-14-gifs/.
Quipster 
Hilarious!
Might teach the kid to stay away from the band, eh?