Watch Sadisflix. YouTuber Coaster Studios presents a feature length documentary about the roller coaster manufacturer Rocky Mountain Construction! This documentary tells the story of Fred Grubb, a humble man from a small town in Wyoming with a big sense for adventure. He’d go on to develop a new way of building roller coaster track that would change the industry forever. This story goes into all of the challenges, hardships, and experiences that went into bringing these incredible thrill rides to life.