Here's my walk-on horror story... not exactly what you were asking, but I feel the need to share-
In college, we were doing a production of Deadwood Dick, a Wild West melodrama. The founder of Yellawood Lumber, which is based near where I went to school, donated a massive amount of money to the College of Liberal Arts, and our opening night party was also a gala in his honor, and so the university had the bright idea of giving him a walk-on role.
Now if you live in the Southeast US, you may have seen him in a commercial or on a billboard in his BRIGHT YELLOW cowboy outfit. If you haven't, just imagine a pudgy, middle-aged man in a ridiculous yellow cowboy suit.
This walk-on role consisted of him, in his yellow suit, walking onto the stage and announcing "The stagecoach is coming!" and then walking off again- a line normally said by one of the ensemble cowboys. In this case, the ensemble cowboy got the line "Who was that Yella Fella?" Absurd, ridiculous, cheesy, and the audience full of donors loved it.
But here's the best part- the man rode to the party afterward on a horse, in his yellow suit, and promptly fell off the horse in front of the entire crowd of bigwigs.