a related story:
I just played in a small recital on Monday, at a retirement community. To get the full impact of the scene, I must describe the "stage," which wasn't raised at all. The performance was actually in a common-area/hallway with a bar. The piano was jammed in a corner and the wheels stuck on those plastic cup-holder-like brakes, so it couldn't be moved out. Then, a few feet to the left of the piano (the audience's left, pianist's right), was a set of French doors leading outside. The audience had a straight view down the path that went through the grounds.
The first performer was a violinist -- short, asian (although that is redundant), and 11 years old. He was in the middle of a Bach partita (which he did not play particularly well), when we see in the distance this old geezer limping down the sidewalk. He cannot see the piano, but he probably can see the violinist and the audience.
He is growing closer and closer, the violinist is still playing...He takes out his key-card and swipes it, the door clicks open, and he walks right through the "stage", past the audience, and down the hall the other way.
I'm trying not to laugh, and the kid keeps on playing.