Fans of the Rock 'n Roller Coaster starring Aerosmith may know the preshow script by heart, especially this scene...
Aerosmith guitarist Joe Perry asks someone named Chris to grab his black Les Paul guitar for him. So who is Chris and why is Joe asking for it?
In the early part of the Rock 'n Roller Coaster, there would be a real life Cast Member inside the "recording studio" that would gesture to Joe that he had heard Joe and would then grab the guitar for him (Les Paul is a brand of electric guitars). However, the position of "Chris" has been removed and you can no longer see him there.
So what happened to Chris? There used to be a black Les Paul guitar that was once owned by Joe Perry that was inside the preshow area. There was a regular cast member position open for the role of “Chris”, and as with most front line positions, shifts changed throughout the day, so access to the preshow room and the guitar was a lot easier to obtain than it is today. As a result, the instruments and props in the "recording studio" area of the preshow were damaged, intentionally vandalized, and in some cases, completely disappeared.
As to why the name was Chris? Chris is a name that can be a boys name just as much as a nickname for a girl. And since the position would need to be staffed by potentially men and women, Disney gave the character a gender neutral name.
Because of these issues, the position of "Chris" was eliminated and the black Les Paul was removed and kept back stage. The preshow film was designed to allow for "Chris" to potentially not be there, as you can see a band staff member comes to Joe quickly to tell him that he'll get the guitar for him. Nonetheless, it's been many years now since we saw Chris in the studio.