Re: "Then this'll be your big chance to get away from it all."
The first one, "a chance to get away from it all" is just an old expression. I don't remember it, or the other one being from any comercial or being a buzz phrase of the time.
In all the history of the world, a riot has NEVER broken out at a Sci-Fi convention.
"It's a fucking TV show!" - Gary Lockwood