Finding pics of this very strange coaster/luge concept?

It had these very low round shaped cars that went through a sort of dry waterslide, but it was a coaster I think. I think I saw pics of it on No Limits Exchange. It was like a bobsled coaster part waterslide ride.

Are you talking about Alpine Slides? There's a set in eastern Minnesota, they are so much fun

This luge like waterslide like coaster seems to dart in and out of a waterslide complex on a hill.