1. I amended to clarinet
2.
The Wall concert overview
Scroll down to the picture of the Wall falling and look left, you see this:
"By The Trial, it was Roger on stage alone contemplating his fate against the animated court. There the brutal judge dredged up the characters in Pink's life before him and demanded The Wall be torn down, exposing all of Pink's frailty and fears in full view. Images flashed on The Wall in rapid sequence as the first few bricks tumbled down onstage. The rumble grew louder until the entire edifice came crashing down in systematic chaos.
During Outside The Wall, the minstrels of doom armed with acoustic guitars, a mandolin, an accordian, and Waters puffing on a clarinet, marched through the rubble in the final act, proclaiming "it's not easy banging your heart against some mad bugger's wall".