Old guy wearing S&S cap with wifey: What are they looking at?

a.  A guy who just appeared on stage asking: "Is there a piano tuner in the house?"

b. Two piano tuners having shown up are now arguing over who will tune the piano.

c. Bass string broke, shot across the stage, ricocheted off a cello and landed on the conductor's stand.

d. A "Shout House" performance.

e. Basketball game.