Notice the hands over the ears - it's good to know that rock and roll can still offend. The cliche "If it's too loud, you're too old" is too obvious here. What comes to my mind is "Why did you sit so close?" or "Why not give your seats to the rockabilly hot rod guys at the beer stand that want it to be louder?"
Phil Alvin displays his famous grimace as he is eaten by a giant electric cactus.
The duck pond is very effective at discouraging stage dives.
Before the show, the cactus lies in wait, ready to strike.