A funny take on the royal we is in the movie "Blazing Saddles." Gene Wilder (Jim The Waco Kid) has just awoken in jail and is being addressed by Cleavon Little (Sherrif Bart), who is black:

SHERRIF BART: Are we awake?
JIM THE WACO KID: We're not sure. Are we black?
SHERRIF BART: Yes we are.
JIM THE WACO KID: Then we're awake, but we're very puzzled.