"How far into the past?" Jon asked.
Karyn thought it over and said "A hundred and twenty years ago?"
"A hundred and twenty years? That's it? What about a thousand years, or million?"
"Well, I always wondered what the Old West was like. You know, with all those cowboys and stuff."
Jon shrugged and said "Okay."
They both stepped into the chamber, which was a tight squeeze, and waited for something to happen.
"Maybe you have to say out loud where you want to go," Karyn suggested.
Jon cleared his throat and said "A hundred and twenty years ago."
And with that, the chamber glowed brightly and they were gone.