Motorcycle Hills Transform Into Factory Escape

was on a motorcycle trip somewhere in the rolling hills with Nikki's dad and stepmom. We were each on our own bikes and the hills started getting bigger and more frequent, very much like moguls when skiiing. Eventually the hills got so steep up and down that you could barely make it to the top before dropping straight back down again, so we hit one peak and the bike stopped perfectly on top. It was a great drop back down that none of us wanted to do so we waited and looked around and saw a bunch of other bikers in the same predicament. Somehow John Matthews and Addie Andrews saw us and climbed around the edge of the wall to get to us and then we decided the 3 of us would climb down and look for another way out for everyone else.  We somehow climbed down without falling and found a door at the bottom. We went in. It was a great big warehouse stairwell and then another door that led to the warehouse, like a factory of some sort. We were able to find this lever that leveled out the hills and when we came back out everything was flat.