That's what I thought it was. It should be called bar shake or something. In the Valley of Fire there is a long straight away with a lot of little hills. It feels like a roller coaster. I got a bunch of head shakes. My rear wheel even came up one time cuz I was leaning forward so the front won't come off. A dmrner would have came in handy then. One guy said he had his scott's maxed out and it was still shaking. I know all you guys would like this place. Oh yeah, thanks for clarifying.