So I was up in CA this weekend at Niagara Falls....in one of those arcade places on Clifton Hill, I ran across a little ride for little kids called Kiddie Coaster. For 2 Canadian quarters, you could "ride" the Blue Streak and the Gemini (CP). You sat in a little cart with a bar to brace yourself, and a TV screen right in front of you showed the footage. I'm small enough to fit in there, so I gave it a try...it was pretty cool, the little cart actually moved with the hills and everything!
It just struck me as weird that they'd have a ride like that up in CA! But I guess that just shows how awesome CP is! But why the Gemini and the Blue Streak? I looked for a year (copyright or something ) on the ride, thinking maybe those were the two newest rides at CP at the time the ride was made, but no luck.
They have a video game here on campus (University of Maryland) that has a moveing base to simulate movements and such. For $1 you can either play one of the 4 or so games that utilize the simulator base, OR you can sit back and "ride" Phoenix, Raven, or The Legend.
I have seen the one you're talking about though. The one I think I saw was at Potomic Mills in VA. Seemed really small for anyone reasonably large to ride. The one I saw could fit pretty much anyone of any size